online_analyze.c

   1 /*
   2  * Copyright (c) 2011 Teodor Sigaev <teodor@sigaev.ru>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *              notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *              notice, this list of conditions and the following disclaimer in the
  12  *              documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *              may be used to endorse or promote products derived from this software
  15  *              without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "postgres.h"
  31
  32 #include "pgstat.h"
  33 #include "access/transam.h"
  34 #include "access/xact.h"
  35 #include "catalog/namespace.h"
  36 #include "commands/vacuum.h"
  37 #include "executor/executor.h"
  38 #include "nodes/nodes.h"
  39 #include "nodes/parsenodes.h"
  40 #include "storage/bufmgr.h"
  41 #include "utils/builtins.h"
  42 #include "utils/hsearch.h"
  43 #include "utils/memutils.h"
  44 #include "utils/lsyscache.h"
  45 #include "utils/guc.h"
  46 #if PG_VERSION_NUM >= 90200
  47 #include "catalog/pg_class.h"
  48 #include "nodes/primnodes.h"
  49 #include "tcop/utility.h"
  50 #include "utils/rel.h"
  51 #include "utils/relcache.h"
  52 #include "utils/timestamp.h"
  53 #if PG_VERSION_NUM >= 90500
  54 #include "nodes/makefuncs.h"
  55 #if PG_VERSION_NUM >= 100000
  56 #include "utils/varlena.h"
  57 #include "utils/regproc.h"
  58 #endif
  59 #endif
  60 #endif
  61
  62 #ifdef PG_MODULE_MAGIC
  63 PG_MODULE_MAGIC;
  64 #endif
  65
  66 static bool online_analyze_enable = true;
  67 static bool online_analyze_local_tracking = false;
  68 static bool online_analyze_verbose = true;
  69 static double online_analyze_scale_factor = 0.1;
  70 static int online_analyze_threshold = 50;
  71 static int online_analyze_capacity_threshold = 100000;
  72 static double online_analyze_min_interval = 10000;
  73 static int online_analyze_lower_limit = 0;
  74
  75 static ExecutorEnd_hook_type oldExecutorEndHook = NULL;
  76 #if PG_VERSION_NUM >= 90200
  77 static ProcessUtility_hook_type oldProcessUtilityHook = NULL;
  78 #endif
  79
  80 typedef enum CmdKind
  81 {
  82         CK_SELECT = CMD_SELECT,
  83         CK_UPDATE = CMD_UPDATE,
  84         CK_INSERT = CMD_INSERT,
  85         CK_DELETE = CMD_DELETE,
  86         CK_TRUNCATE,
  87         CK_FASTTRUNCATE,
  88         CK_CREATE,
  89         CK_ANALYZE,
  90         CK_VACUUM
  91 } CmdKind;
  92
  93
  94 typedef enum
  95 {
  96         OATT_ALL                = 0x03,
  97         OATT_PERSISTENT = 0x01,
  98         OATT_TEMPORARY  = 0x02,
  99         OATT_NONE               = 0x00
 100 } OnlineAnalyzeTableType;
 101
 102 static const struct config_enum_entry online_analyze_table_type_options[] =
 103 {
 104         {"all", OATT_ALL, false},
 105         {"persistent", OATT_PERSISTENT, false},
 106         {"temporary", OATT_TEMPORARY, false},
 107         {"none", OATT_NONE, false},
 108         {NULL, 0, false},
 109 };
 110
 111 static int online_analyze_table_type = (int)OATT_ALL;
 112
 113 typedef struct TableList {
 114         int             nTables;
 115         Oid             *tables;
 116         char    *tableStr;
 117 } TableList;
 118
 119 static TableList excludeTables = {0, NULL, NULL};
 120 static TableList includeTables = {0, NULL, NULL};
 121
 122 typedef struct OnlineAnalyzeTableStat {
 123         Oid                             tableid;
 124         bool                    rereadStat;
 125         PgStat_Counter  n_tuples;
 126         PgStat_Counter  changes_since_analyze;
 127         TimestampTz             autovac_analyze_timestamp;
 128         TimestampTz             analyze_timestamp;
 129 } OnlineAnalyzeTableStat;
 130
 131 static  MemoryContext   onlineAnalyzeMemoryContext = NULL;
 132 static  HTAB    *relstats = NULL;
 133
 134 static void relstatsInit(void);
 135
 136 #if PG_VERSION_NUM < 100000
 137 static int
 138 oid_cmp(const void *a, const void *b)
 139 {
 140         if (*(Oid*)a == *(Oid*)b)
 141                 return 0;
 142         return (*(Oid*)a > *(Oid*)b) ? 1 : -1;
 143 }
 144 #endif
 145
 146 static const char *
 147 tableListAssign(const char * newval, bool doit, TableList *tbl)
 148 {
 149         char            *rawname;
 150         List            *namelist;
 151         ListCell        *l;
 152         Oid                     *newOids = NULL;
 153         int                     nOids = 0,
 154                                 i = 0;
 155
 156         rawname = pstrdup(newval);
 157
 158         if (!SplitIdentifierString(rawname, ',', &namelist))
 159                 goto cleanup;
 160
 161         if (doit)
 162         {
 163                 nOids = list_length(namelist);
 164                 newOids = malloc(sizeof(Oid) * (nOids+1));
 165                 if (!newOids)
 166                         elog(ERROR,"could not allocate %d bytes",
 167                                  (int)(sizeof(Oid) * (nOids+1)));
 168         }
 169
 170         foreach(l, namelist)
 171         {
 172                 char    *curname = (char *) lfirst(l);
 173 #if PG_VERSION_NUM >= 90200
 174                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 175                                                         stringToQualifiedNameList(curname)), NoLock, true);
 176 #else
 177                 Oid             relOid = RangeVarGetRelid(makeRangeVarFromNameList(
 178                                                         stringToQualifiedNameList(curname)), true);
 179 #endif
 180
 181                 if (relOid == InvalidOid)
 182                 {
 183 #if PG_VERSION_NUM >= 90100
 184                         if (doit == false)
 185 #endif
 186                         elog(WARNING,"'%s' does not exist", curname);
 187                         continue;
 188                 }
 189                 else if ( get_rel_relkind(relOid) != RELKIND_RELATION )
 190                 {
 191 #if PG_VERSION_NUM >= 90100
 192                         if (doit == false)
 193 #endif
 194                                 elog(WARNING,"'%s' is not an table", curname);
 195                         continue;
 196                 }
 197                 else if (doit)
 198                 {
 199                         newOids[i++] = relOid;
 200                 }
 201         }
 202
 203         if (doit)
 204         {
 205                 tbl->nTables = i;
 206                 if (tbl->tables)
 207                         free(tbl->tables);
 208                 tbl->tables = newOids;
 209                 if (tbl->nTables > 1)
 210                         qsort(tbl->tables, tbl->nTables, sizeof(tbl->tables[0]), oid_cmp);
 211         }
 212
 213         pfree(rawname);
 214         list_free(namelist);
 215
 216         return newval;
 217
 218 cleanup:
 219         if (newOids)
 220                 free(newOids);
 221         pfree(rawname);
 222         list_free(namelist);
 223         return NULL;
 224 }
 225
 226 #if PG_VERSION_NUM >= 90100
 227 static bool
 228 excludeTablesCheck(char **newval, void **extra, GucSource source)
 229 {
 230         char *val;
 231
 232         val = (char*)tableListAssign(*newval, false, &excludeTables);
 233
 234         if (val)
 235         {
 236                 *newval = val;
 237                 return true;
 238         }
 239
 240         return false;
 241 }
 242
 243 static void
 244 excludeTablesAssign(const char *newval, void *extra)
 245 {
 246         tableListAssign(newval, true, &excludeTables);
 247 }
 248
 249 static bool
 250 includeTablesCheck(char **newval, void **extra, GucSource source)
 251 {
 252         char *val;
 253
 254         val = (char*)tableListAssign(*newval, false, &includeTables);
 255
 256         if (val)
 257         {
 258                 *newval = val;
 259                 return true;
 260         }
 261
 262         return false;
 263 }
 264
 265 static void
 266 includeTablesAssign(const char *newval, void *extra)
 267 {
 268         tableListAssign(newval, true, &excludeTables);
 269 }
 270
 271 #else /* PG_VERSION_NUM < 90100 */
 272
 273 static const char *
 274 excludeTablesAssign(const char * newval, bool doit, GucSource source)
 275 {
 276         return tableListAssign(newval, doit, &excludeTables);
 277 }
 278
 279 static const char *
 280 includeTablesAssign(const char * newval, bool doit, GucSource source)
 281 {
 282         return tableListAssign(newval, doit, &includeTables);
 283 }
 284
 285 #endif
 286
 287 static const char*
 288 tableListShow(TableList *tbl)
 289 {
 290         char    *val, *ptr;
 291         int             i,
 292                         len;
 293
 294         len = 1 /* \0 */ + tbl->nTables * (2 * NAMEDATALEN + 2 /* ', ' */ + 1 /* . */);
 295         ptr = val = palloc(len);
 296         *ptr ='\0';
 297         for(i=0; i<tbl->nTables; i++)
 298         {
 299                 char    *relname = get_rel_name(tbl->tables[i]);
 300                 Oid             nspOid = get_rel_namespace(tbl->tables[i]);
 301                 char    *nspname = get_namespace_name(nspOid);
 302
 303                 if ( relname == NULL || nspOid == InvalidOid || nspname == NULL )
 304                         continue;
 305
 306                 ptr += snprintf(ptr, len - (ptr - val), "%s%s.%s",
 307                                                                                                         (i==0) ? "" : ", ",
 308                                                                                                         nspname, relname);
 309         }
 310
 311         return val;
 312 }
 313
 314 static const char*
 315 excludeTablesShow(void)
 316 {
 317         return tableListShow(&excludeTables);
 318 }
 319
 320 static const char*
 321 includeTablesShow(void)
 322 {
 323         return tableListShow(&includeTables);
 324 }
 325
 326 static bool
 327 matchOid(TableList *tbl, Oid oid)
 328 {
 329         Oid     *StopLow = tbl->tables,
 330                 *StopHigh = tbl->tables + tbl->nTables,
 331                 *StopMiddle;
 332
 333         /* Loop invariant: StopLow <= val < StopHigh */
 334         while (StopLow < StopHigh)
 335         {
 336                 StopMiddle = StopLow + ((StopHigh - StopLow) >> 1);
 337
 338                 if (*StopMiddle == oid)
 339                         return true;
 340                 else  if (*StopMiddle < oid)
 341                         StopLow = StopMiddle + 1;
 342                 else
 343                         StopHigh = StopMiddle;
 344         }
 345
 346         return false;
 347 }
 348
 349 #if PG_VERSION_NUM >= 90500
 350 static RangeVar*
 351 makeRangeVarFromOid(Oid relOid)
 352 {
 353         return makeRangeVar(
 354                                 get_namespace_name(get_rel_namespace(relOid)),
 355                                 get_rel_name(relOid),
 356                                 -1
 357                         );
 358
 359 }
 360 #endif
 361
 362 static void
 363 makeAnalyze(Oid relOid, CmdKind operation, int64 naffected)
 364 {
 365         TimestampTz                             now = GetCurrentTimestamp();
 366         Relation                                rel;
 367         OnlineAnalyzeTableType  reltype;
 368         bool                                    found = false,
 369                                                         newTable = false;
 370         OnlineAnalyzeTableStat  *rstat,
 371                                                         dummyrstat;
 372         PgStat_StatTabEntry             *tabentry = NULL;
 373
 374         if (relOid == InvalidOid)
 375                 return;
 376
 377         if (naffected == 0)
 378                 /* return if there is no changes */
 379                 return;
 380         else if (naffected < 0)
 381                 /* number if affected rows is unknown */
 382                 naffected = 0;
 383
 384         rel = RelationIdGetRelation(relOid);
 385         if (rel->rd_rel->relkind != RELKIND_RELATION)
 386         {
 387                 RelationClose(rel);
 388                 return;
 389         }
 390
 391         reltype =
 392 #if PG_VERSION_NUM >= 90100
 393                 (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
 394 #else
 395                 (rel->rd_istemp || rel->rd_islocaltemp)
 396 #endif
 397                         ? OATT_TEMPORARY : OATT_PERSISTENT;
 398
 399         RelationClose(rel);
 400
 401         /*
 402          * includeTables overwrites excludeTables
 403          */
 404         switch(online_analyze_table_type)
 405         {
 406                 case OATT_ALL:
 407                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 408                                 (matchOid(&excludeTables, relOid) == true &&
 409                                 matchOid(&includeTables, relOid) == false))
 410                                 return;
 411                         break;
 412                 case OATT_NONE:
 413                         if (get_rel_relkind(relOid) != RELKIND_RELATION ||
 414                                 matchOid(&includeTables, relOid) == false)
 415                                 return;
 416                         break;
 417                 case OATT_TEMPORARY:
 418                 case OATT_PERSISTENT:
 419                 default:
 420                         /*
 421                          * skip analyze if relation's type doesn't not match
 422                          * online_analyze_table_type
 423                          */
 424                         if ((online_analyze_table_type & reltype) == 0 ||
 425                                 matchOid(&excludeTables, relOid) == true)
 426                         {
 427                                 if (matchOid(&includeTables, relOid) == false)
 428                                         return;
 429                         }
 430                         break;
 431         }
 432
 433         /*
 434          * Do not store data about persistent table in local memory because we
 435          * could not track changes of them: they could be changed by another
 436          * backends. So always get a pgstat table entry.
 437          */
 438         if (reltype == OATT_TEMPORARY)
 439                 rstat = hash_search(relstats, &relOid, HASH_ENTER, &found);
 440         else
 441                 rstat = &dummyrstat; /* found == false for following if */
 442
 443         if (!found)
 444         {
 445                 MemSet(rstat, 0, sizeof(*rstat));
 446                 rstat->tableid = relOid;
 447                 newTable = true;
 448         }
 449         else if (operation == CK_VACUUM)
 450         {
 451                 /* force reread becouse vacuum could change n_tuples */
 452                 rstat->rereadStat = true;
 453                 return;
 454         }
 455         else if (operation == CK_ANALYZE)
 456         {
 457                 /* only analyze */
 458                 rstat->changes_since_analyze = 0;
 459                 rstat->analyze_timestamp = now;
 460                 return;
 461         }
 462
 463         Assert(rstat->tableid == relOid);
 464
 465         if (
 466                 /* do not reread data if it was a truncation */
 467                 operation != CK_TRUNCATE && operation != CK_FASTTRUNCATE &&
 468                 /* read  for persistent table and for temp teble if it allowed */
 469                 (reltype == OATT_PERSISTENT || online_analyze_local_tracking == false) &&
 470                 /* read only for new table or we know that it's needed */
 471                 (newTable == true || rstat->rereadStat == true)
 472            )
 473         {
 474                 rstat->rereadStat = false;
 475
 476                 tabentry = pgstat_fetch_stat_tabentry(relOid);
 477
 478                 if (tabentry)
 479                 {
 480                         rstat->n_tuples = tabentry->n_dead_tuples + tabentry->n_live_tuples;
 481                         rstat->changes_since_analyze =
 482 #if PG_VERSION_NUM >= 90000
 483                                 tabentry->changes_since_analyze;
 484 #else
 485                                 tabentry->n_live_tuples + tabentry->n_dead_tuples -
 486                                         tabentry->last_anl_tuples;
 487 #endif
 488                         rstat->autovac_analyze_timestamp =
 489                                 tabentry->autovac_analyze_timestamp;
 490                         rstat->analyze_timestamp = tabentry->analyze_timestamp;
 491                 }
 492         }
 493
 494         if (newTable ||
 495                 /* force analyze after truncate, fasttruncate already did analyze */
 496                 operation == CK_TRUNCATE || (
 497                 /* do not analyze too often, if both stamps are exceeded the go */
 498                 TimestampDifferenceExceeds(rstat->analyze_timestamp, now, online_analyze_min_interval) &&
 499                 TimestampDifferenceExceeds(rstat->autovac_analyze_timestamp, now, online_analyze_min_interval) &&
 500                 /* do not analyze too small tables */
 501                 rstat->n_tuples + rstat->changes_since_analyze + naffected > online_analyze_lower_limit &&
 502                 /* be in sync with relation_needs_vacanalyze */
 503                 ((double)(rstat->changes_since_analyze + naffected)) >=
 504                          online_analyze_scale_factor * ((double)rstat->n_tuples) +
 505                          (double)online_analyze_threshold))
 506         {
 507 #if PG_VERSION_NUM < 90500
 508                 VacuumStmt                              vacstmt;
 509 #else
 510                 VacuumParams                    vacstmt;
 511 #endif
 512                 TimestampTz                             startStamp, endStamp;
 513
 514
 515                 memset(&startStamp, 0, sizeof(startStamp)); /* keep compiler quiet */
 516
 517                 memset(&vacstmt, 0, sizeof(vacstmt));
 518
 519                 vacstmt.freeze_min_age = -1;
 520                 vacstmt.freeze_table_age = -1; /* ??? */
 521
 522 #if PG_VERSION_NUM < 90500
 523                 vacstmt.type = T_VacuumStmt;
 524                 vacstmt.relation = NULL;
 525                 vacstmt.va_cols = NIL;
 526 #if PG_VERSION_NUM >= 90000
 527                 vacstmt.options = VACOPT_ANALYZE;
 528                 if (online_analyze_verbose)
 529                         vacstmt.options |= VACOPT_VERBOSE;
 530 #else
 531                 vacstmt.vacuum = vacstmt.full = false;
 532                 vacstmt.analyze = true;
 533                 vacstmt.verbose = online_analyze_verbose;
 534 #endif
 535 #else
 536                 vacstmt.multixact_freeze_min_age = -1;
 537                 vacstmt.multixact_freeze_table_age = -1;
 538                 vacstmt.log_min_duration = -1;
 539 #endif
 540
 541                 if (online_analyze_verbose)
 542                         startStamp = GetCurrentTimestamp();
 543
 544                 analyze_rel(relOid,
 545 #if PG_VERSION_NUM < 90500
 546                         &vacstmt
 547 #if PG_VERSION_NUM >= 90018
 548                         , true
 549 #endif
 550                         , GetAccessStrategy(BAS_VACUUM)
 551 #if (PG_VERSION_NUM >= 90000) && (PG_VERSION_NUM < 90004)
 552                         , true
 553 #endif
 554 #else
 555                         makeRangeVarFromOid(relOid),
 556                         VACOPT_ANALYZE | ((online_analyze_verbose) ? VACOPT_VERBOSE : 0),
 557                         &vacstmt, NULL, true, GetAccessStrategy(BAS_VACUUM)
 558 #endif
 559                 );
 560
 561                 /* Make changes visible to subsequent calls */
 562                 CommandCounterIncrement();
 563
 564                 if (online_analyze_verbose)
 565                 {
 566                         long    secs;
 567                         int             microsecs;
 568
 569                         endStamp = GetCurrentTimestamp();
 570                         TimestampDifference(startStamp, endStamp, &secs, &microsecs);
 571                         elog(INFO, "analyze \"%s\" took %.02f seconds",
 572                                 get_rel_name(relOid),
 573                                 ((double)secs) + ((double)microsecs)/1.0e6);
 574                 }
 575
 576                 rstat->autovac_analyze_timestamp = now;
 577                 rstat->changes_since_analyze = 0;
 578
 579                 switch(operation)
 580                 {
 581                         case CK_CREATE:
 582                         case CK_INSERT:
 583                         case CK_UPDATE:
 584                                 rstat->n_tuples += naffected;
 585                         case CK_DELETE:
 586                                 rstat->rereadStat = (reltype == OATT_PERSISTENT);
 587                                 break;
 588                         case CK_TRUNCATE:
 589                         case CK_FASTTRUNCATE:
 590                                 rstat->rereadStat = false;
 591                                 rstat->n_tuples = 0;
 592                                 break;
 593                         default:
 594                                 break;
 595                 }
 596
 597                 /* update last analyze timestamp in local memory of backend */
 598                 if (tabentry)
 599                 {
 600                         tabentry->analyze_timestamp = now;
 601                         tabentry->changes_since_analyze = 0;
 602                 }
 603 #if 0
 604                 /* force reload stat for new table */
 605                 if (newTable)
 606                         pgstat_clear_snapshot();
 607 #endif
 608         }
 609         else
 610         {
 611 #if PG_VERSION_NUM >= 90000
 612                 if (tabentry)
 613                         tabentry->changes_since_analyze += naffected;
 614 #endif
 615                 switch(operation)
 616                 {
 617                         case CK_CREATE:
 618                         case CK_INSERT:
 619                                 rstat->changes_since_analyze += naffected;
 620                                 rstat->n_tuples += naffected;
 621                                 break;
 622                         case CK_UPDATE:
 623                                 rstat->changes_since_analyze += 2 * naffected;
 624                                 rstat->n_tuples += naffected;
 625                         case CK_DELETE:
 626                                 rstat->changes_since_analyze += naffected;
 627                                 break;
 628                         case CK_TRUNCATE:
 629                         case CK_FASTTRUNCATE:
 630                                 rstat->changes_since_analyze = 0;
 631                                 rstat->n_tuples = 0;
 632                                 break;
 633                         default:
 634                                 break;
 635                 }
 636         }
 637
 638         /* Reset local cache if we are over limit */
 639         if (hash_get_num_entries(relstats) > online_analyze_capacity_threshold)
 640                 relstatsInit();
 641 }
 642
 643 static Const*
 644 isFastTruncateCall(QueryDesc *queryDesc)
 645 {
 646         TargetEntry     *te;
 647         FuncExpr        *fe;
 648         Const           *constval;
 649
 650         if (!(
 651                   queryDesc->plannedstmt &&
 652                   queryDesc->operation == CMD_SELECT &&
 653                   queryDesc->plannedstmt->planTree &&
 654                   queryDesc->plannedstmt->planTree->targetlist &&
 655                   list_length(queryDesc->plannedstmt->planTree->targetlist) == 1
 656                  ))
 657                 return NULL;
 658
 659         te = linitial(queryDesc->plannedstmt->planTree->targetlist);
 660
 661         if (!IsA(te, TargetEntry))
 662                 return NULL;
 663
 664         fe = (FuncExpr*)te->expr;
 665
 666         if (!(
 667                   fe && IsA(fe, FuncExpr) &&
 668                   fe->funcid >= FirstNormalObjectId &&
 669                   fe->funcretset == false &&
 670                   fe->funcresulttype == VOIDOID &&
 671                   fe->funcvariadic == false &&
 672                   list_length(fe->args) == 1
 673                  ))
 674                 return NULL;
 675
 676         constval = linitial(fe->args);
 677
 678         if (!(
 679                   IsA(constval,Const) &&
 680                   constval->consttype == TEXTOID &&
 681                   strcmp(get_func_name(fe->funcid), "fasttruncate") == 0
 682                  ))
 683                 return NULL;
 684
 685         return constval;
 686 }
 687
 688
 689 extern PGDLLIMPORT void onlineAnalyzeHooker(QueryDesc *queryDesc);
 690 void
 691 onlineAnalyzeHooker(QueryDesc *queryDesc)
 692 {
 693         int64   naffected = -1;
 694         Const   *constval;
 695
 696         if (queryDesc->estate)
 697                 naffected = queryDesc->estate->es_processed;
 698
 699 #if PG_VERSION_NUM >= 90200
 700         if (online_analyze_enable &&
 701                 (constval = isFastTruncateCall(queryDesc)) != NULL)
 702         {
 703                 Datum           tblnamed = constval->constvalue;
 704                 char            *tblname = text_to_cstring(DatumGetTextP(tblnamed));
 705                 RangeVar        *tblvar =
 706                         makeRangeVarFromNameList(stringToQualifiedNameList(tblname));
 707
 708                 makeAnalyze(RangeVarGetRelid(tblvar,
 709                                                                          NoLock,
 710                                                                          false),
 711                                         CK_FASTTRUNCATE, -1);
 712         }
 713 #endif
 714
 715         if (online_analyze_enable && queryDesc->plannedstmt &&
 716                         (queryDesc->operation == CMD_INSERT ||
 717                          queryDesc->operation == CMD_UPDATE ||
 718                          queryDesc->operation == CMD_DELETE
 719 #if PG_VERSION_NUM < 90200
 720                          || (queryDesc->operation == CMD_SELECT &&
 721                                  queryDesc->plannedstmt->intoClause)
 722 #endif
 723                          ))
 724         {
 725 #if PG_VERSION_NUM < 90200
 726                 if (queryDesc->operation == CMD_SELECT)
 727                 {
 728                         Oid     relOid = RangeVarGetRelid(queryDesc->plannedstmt->intoClause->rel, true);
 729
 730                         makeAnalyze(relOid, queryDesc->operation, naffected);
 731                 }
 732                 else
 733 #endif
 734                 if (queryDesc->plannedstmt->resultRelations &&
 735                                  queryDesc->plannedstmt->rtable)
 736                 {
 737                         ListCell        *l;
 738
 739                         foreach(l, queryDesc->plannedstmt->resultRelations)
 740                         {
 741                                 int                             n = lfirst_int(l);
 742                                 RangeTblEntry   *rte = list_nth(queryDesc->plannedstmt->rtable, n-1);
 743
 744                                 if (rte->rtekind == RTE_RELATION)
 745                                         makeAnalyze(rte->relid, (CmdKind)queryDesc->operation, naffected);
 746                         }
 747                 }
 748         }
 749
 750         if (oldExecutorEndHook)
 751                 oldExecutorEndHook(queryDesc);
 752         else
 753                 standard_ExecutorEnd(queryDesc);
 754 }
 755
 756 static List             *toremove = NIL;
 757
 758 /*
 759  * removeTable called on transaction end, see call RegisterXactCallback() below
 760  */
 761 static void
 762 removeTable(XactEvent event, void *arg)
 763 {
 764         ListCell        *cell;
 765
 766         switch(event)
 767         {
 768                 case XACT_EVENT_COMMIT:
 769                         break;
 770                 case XACT_EVENT_ABORT:
 771                         toremove = NIL;
 772                 default:
 773                         return;
 774         }
 775
 776         foreach(cell, toremove)
 777         {
 778                 Oid     relOid = lfirst_oid(cell);
 779
 780                 hash_search(relstats, &relOid, HASH_REMOVE, NULL);
 781         }
 782
 783         toremove = NIL;
 784 }
 785
 786
 787 #if PG_VERSION_NUM >= 90200
 788 static void
 789 onlineAnalyzeHookerUtility(
 790 #if PG_VERSION_NUM >= 100000
 791                                                    PlannedStmt *pstmt,
 792 #else
 793                                                    Node *parsetree,
 794 #endif
 795                                                    const char *queryString,
 796 #if PG_VERSION_NUM >= 90300
 797                                                         ProcessUtilityContext context, ParamListInfo params,
 798 #if PG_VERSION_NUM >= 100000
 799                                                         QueryEnvironment *queryEnv,
 800 #endif
 801 #else
 802                                                         ParamListInfo params, bool isTopLevel,
 803 #endif
 804                                                         DestReceiver *dest, char *completionTag) {
 805         List            *tblnames = NIL;
 806         CmdKind         op = CK_INSERT;
 807 #if PG_VERSION_NUM >= 100000
 808         Node            *parsetree = NULL;
 809
 810         if (pstmt->commandType == CMD_UTILITY)
 811                 parsetree = pstmt->utilityStmt;
 812 #endif
 813
 814         if (parsetree && online_analyze_enable)
 815         {
 816                 if (IsA(parsetree, CreateTableAsStmt) &&
 817                         ((CreateTableAsStmt*)parsetree)->into)
 818                 {
 819                         tblnames =
 820                                 list_make1((RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel));
 821                         op = CK_CREATE;
 822                 }
 823                 else if (IsA(parsetree, TruncateStmt))
 824                 {
 825                         tblnames = list_copy(((TruncateStmt*)parsetree)->relations);
 826                         op = CK_TRUNCATE;
 827                 }
 828                 else if (IsA(parsetree, DropStmt) &&
 829                                  ((DropStmt*)parsetree)->removeType == OBJECT_TABLE)
 830                 {
 831                         ListCell        *cell;
 832
 833                         foreach(cell, ((DropStmt*)parsetree)->objects)
 834                         {
 835                                 List            *relname = (List *) lfirst(cell);
 836                                 RangeVar        *rel = makeRangeVarFromNameList(relname);
 837                                 Oid                     relOid = RangeVarGetRelid(rel, NoLock, true);
 838
 839                                 if (OidIsValid(relOid))
 840                                 {
 841                                         MemoryContext   ctx;
 842
 843                                         ctx = MemoryContextSwitchTo(TopTransactionContext);
 844                                         toremove = lappend_oid(toremove, relOid);
 845                                         MemoryContextSwitchTo(ctx);
 846                                 }
 847                         }
 848                 }
 849                 else if (IsA(parsetree, VacuumStmt))
 850                 {
 851                         VacuumStmt      *vac = (VacuumStmt*)parsetree;
 852
 853                         if (vac->relation)
 854                                 tblnames = list_make1(vac->relation);
 855
 856                         if (vac->options & (VACOPT_VACUUM | VACOPT_FULL | VACOPT_FREEZE))
 857                         {
 858                                 /* optionally with analyze */
 859                                 op = CK_VACUUM;
 860
 861                                 /* drop all collected stat */
 862                                 if (tblnames == NIL)
 863                                         relstatsInit();
 864                         }
 865                         else if (vac->options & VACOPT_ANALYZE)
 866                         {
 867                                 op = CK_ANALYZE;
 868
 869                                 /* should reset all counters */
 870                                 if (tblnames == NIL)
 871                                 {
 872                                         HASH_SEQ_STATUS                 hs;
 873                                         OnlineAnalyzeTableStat  *rstat;
 874                                         TimestampTz                             now = GetCurrentTimestamp();
 875
 876                                         hash_seq_init(&hs, relstats);
 877
 878                                         while((rstat = hash_seq_search(&hs)) != NULL)
 879                                         {
 880                                                 rstat->changes_since_analyze = 0;
 881                                                 rstat->analyze_timestamp = now;
 882                                         }
 883                                 }
 884                         }
 885                         else
 886                                 tblnames = NIL;
 887                 }
 888         }
 889
 890 #if PG_VERSION_NUM >= 100000
 891 #define parsetree pstmt
 892 #endif
 893
 894         if (oldProcessUtilityHook)
 895                 oldProcessUtilityHook(parsetree, queryString,
 896 #if PG_VERSION_NUM >= 90300
 897                                                           context, params,
 898 #if PG_VERSION_NUM >= 100000
 899                                                           queryEnv,
 900 #endif
 901 #else
 902                                                           params, isTopLevel,
 903 #endif
 904                                                           dest, completionTag);
 905         else
 906                 standard_ProcessUtility(parsetree, queryString,
 907 #if PG_VERSION_NUM >= 90300
 908                                                                 context, params,
 909 #if PG_VERSION_NUM >= 100000
 910                                                                 queryEnv,
 911 #endif
 912 #else
 913                                                                 params, isTopLevel,
 914 #endif
 915                                                                 dest, completionTag);
 916
 917 #if PG_VERSION_NUM >= 100000
 918 #undef parsetree
 919 #endif
 920
 921         if (tblnames) {
 922                 ListCell        *l;
 923
 924                 foreach(l, tblnames)
 925                 {
 926                         RangeVar        *tblname = (RangeVar*)lfirst(l);
 927                         Oid     tblOid = RangeVarGetRelid(tblname, NoLock, true);
 928
 929                         makeAnalyze(tblOid, op, -1);
 930                 }
 931         }
 932 }
 933 #endif
 934
 935 static void
 936 relstatsInit(void)
 937 {
 938         HASHCTL hash_ctl;
 939         int             flags = 0;
 940
 941         MemSet(&hash_ctl, 0, sizeof(hash_ctl));
 942
 943         hash_ctl.hash = oid_hash;
 944         flags |= HASH_FUNCTION;
 945
 946         if (onlineAnalyzeMemoryContext)
 947         {
 948                 Assert(relstats != NULL);
 949                 MemoryContextReset(onlineAnalyzeMemoryContext);
 950         }
 951         else
 952         {
 953                 Assert(relstats == NULL);
 954                 onlineAnalyzeMemoryContext =
 955                         AllocSetContextCreate(CacheMemoryContext,
 956                                                                   "online_analyze storage context",
 957 #if PG_VERSION_NUM < 90600
 958                                                                   ALLOCSET_DEFAULT_MINSIZE,
 959                                                                   ALLOCSET_DEFAULT_INITSIZE,
 960                                                                   ALLOCSET_DEFAULT_MAXSIZE
 961 #else
 962                                                                   ALLOCSET_DEFAULT_SIZES
 963 #endif
 964                                                                  );
 965         }
 966
 967         hash_ctl.hcxt = onlineAnalyzeMemoryContext;
 968         flags |= HASH_CONTEXT;
 969
 970         hash_ctl.keysize = sizeof(Oid);
 971
 972         hash_ctl.entrysize = sizeof(OnlineAnalyzeTableStat);
 973         flags |= HASH_ELEM;
 974
 975         relstats = hash_create("online_analyze storage", 1024, &hash_ctl, flags);
 976 }
 977
 978 void _PG_init(void);
 979 void
 980 _PG_init(void)
 981 {
 982         relstatsInit();
 983
 984         oldExecutorEndHook = ExecutorEnd_hook;
 985
 986         ExecutorEnd_hook = onlineAnalyzeHooker;
 987
 988 #if PG_VERSION_NUM >= 90200
 989         oldProcessUtilityHook = ProcessUtility_hook;
 990
 991         ProcessUtility_hook = onlineAnalyzeHookerUtility;
 992 #endif
 993
 994
 995         DefineCustomBoolVariable(
 996                 "online_analyze.enable",
 997                 "Enable on-line analyze",
 998                 "Enables analyze of table directly after insert/update/delete/select into",
 999                 &online_analyze_enable,
1000 #if PG_VERSION_NUM >= 80400
1001                 online_analyze_enable,
1002 #endif
1003                 PGC_USERSET,
1004 #if PG_VERSION_NUM >= 80400
1005                 GUC_NOT_IN_SAMPLE,
1006 #if PG_VERSION_NUM >= 90100
1007                 NULL,
1008 #endif
1009 #endif
1010                 NULL,
1011                 NULL
1012         );
1013
1014         DefineCustomBoolVariable(
1015                 "online_analyze.local_tracking",
1016                 "Per backend tracking",
1017                 "Per backend tracking for temp tables (do not use system statistic)",
1018                 &online_analyze_local_tracking,
1019 #if PG_VERSION_NUM >= 80400
1020                 online_analyze_local_tracking,
1021 #endif
1022                 PGC_USERSET,
1023 #if PG_VERSION_NUM >= 80400
1024                 GUC_NOT_IN_SAMPLE,
1025 #if PG_VERSION_NUM >= 90100
1026                 NULL,
1027 #endif
1028 #endif
1029                 NULL,
1030                 NULL
1031         );
1032
1033         DefineCustomBoolVariable(
1034                 "online_analyze.verbose",
1035                 "Verbosity of on-line analyze",
1036                 "Make ANALYZE VERBOSE after table's changes",
1037                 &online_analyze_verbose,
1038 #if PG_VERSION_NUM >= 80400
1039                 online_analyze_verbose,
1040 #endif
1041                 PGC_USERSET,
1042 #if PG_VERSION_NUM >= 80400
1043                 GUC_NOT_IN_SAMPLE,
1044 #if PG_VERSION_NUM >= 90100
1045                 NULL,
1046 #endif
1047 #endif
1048                 NULL,
1049                 NULL
1050         );
1051
1052         DefineCustomRealVariable(
1053                 "online_analyze.scale_factor",
1054                 "fraction of table size to start on-line analyze",
1055                 "fraction of table size to start on-line analyze",
1056                 &online_analyze_scale_factor,
1057 #if PG_VERSION_NUM >= 80400
1058                 online_analyze_scale_factor,
1059 #endif
1060                 0.0,
1061                 1.0,
1062                 PGC_USERSET,
1063 #if PG_VERSION_NUM >= 80400
1064                 GUC_NOT_IN_SAMPLE,
1065 #if PG_VERSION_NUM >= 90100
1066                 NULL,
1067 #endif
1068 #endif
1069                 NULL,
1070                 NULL
1071         );
1072
1073         DefineCustomIntVariable(
1074                 "online_analyze.threshold",
1075                 "min number of row updates before on-line analyze",
1076                 "min number of row updates before on-line analyze",
1077                 &online_analyze_threshold,
1078 #if PG_VERSION_NUM >= 80400
1079                 online_analyze_threshold,
1080 #endif
1081                 0,
1082                 0x7fffffff,
1083                 PGC_USERSET,
1084 #if PG_VERSION_NUM >= 80400
1085                 GUC_NOT_IN_SAMPLE,
1086 #if PG_VERSION_NUM >= 90100
1087                 NULL,
1088 #endif
1089 #endif
1090                 NULL,
1091                 NULL
1092         );
1093
1094         DefineCustomIntVariable(
1095                 "online_analyze.capacity_threshold",
1096                 "Max local cache table capacity",
1097                 "Max local cache table capacity",
1098                 &online_analyze_capacity_threshold,
1099 #if PG_VERSION_NUM >= 80400
1100                 online_analyze_capacity_threshold,
1101 #endif
1102                 0,
1103                 0x7fffffff,
1104                 PGC_USERSET,
1105 #if PG_VERSION_NUM >= 80400
1106                 GUC_NOT_IN_SAMPLE,
1107 #if PG_VERSION_NUM >= 90100
1108                 NULL,
1109 #endif
1110 #endif
1111                 NULL,
1112                 NULL
1113         );
1114
1115         DefineCustomRealVariable(
1116                 "online_analyze.min_interval",
1117                 "minimum time interval between analyze call (in milliseconds)",
1118                 "minimum time interval between analyze call (in milliseconds)",
1119                 &online_analyze_min_interval,
1120 #if PG_VERSION_NUM >= 80400
1121                 online_analyze_min_interval,
1122 #endif
1123                 0.0,
1124                 1e30,
1125                 PGC_USERSET,
1126 #if PG_VERSION_NUM >= 80400
1127                 GUC_NOT_IN_SAMPLE,
1128 #if PG_VERSION_NUM >= 90100
1129                 NULL,
1130 #endif
1131 #endif
1132                 NULL,
1133                 NULL
1134         );
1135
1136         DefineCustomEnumVariable(
1137                 "online_analyze.table_type",
1138                 "Type(s) of table for online analyze: all(default), persistent, temporary, none",
1139                 NULL,
1140                 &online_analyze_table_type,
1141 #if PG_VERSION_NUM >= 80400
1142                 online_analyze_table_type,
1143 #endif
1144                 online_analyze_table_type_options,
1145                 PGC_USERSET,
1146 #if PG_VERSION_NUM >= 80400
1147                 GUC_NOT_IN_SAMPLE,
1148 #if PG_VERSION_NUM >= 90100
1149                 NULL,
1150 #endif
1151 #endif
1152                 NULL,
1153                 NULL
1154         );
1155
1156         DefineCustomStringVariable(
1157                 "online_analyze.exclude_tables",
1158                 "List of tables which will not online analyze",
1159                 NULL,
1160                 &excludeTables.tableStr,
1161 #if PG_VERSION_NUM >= 80400
1162                 "",
1163 #endif
1164                 PGC_USERSET,
1165                 0,
1166 #if PG_VERSION_NUM >= 90100
1167                 excludeTablesCheck,
1168                 excludeTablesAssign,
1169 #else
1170                 excludeTablesAssign,
1171 #endif
1172                 excludeTablesShow
1173         );
1174
1175         DefineCustomStringVariable(
1176                 "online_analyze.include_tables",
1177                 "List of tables which will online analyze",
1178                 NULL,
1179                 &includeTables.tableStr,
1180 #if PG_VERSION_NUM >= 80400
1181                 "",
1182 #endif
1183                 PGC_USERSET,
1184                 0,
1185 #if PG_VERSION_NUM >= 90100
1186                 includeTablesCheck,
1187                 includeTablesAssign,
1188 #else
1189                 includeTablesAssign,
1190 #endif
1191                 includeTablesShow
1192         );
1193
1194         DefineCustomIntVariable(
1195                 "online_analyze.lower_limit",
1196                 "min number of rows in table to analyze",
1197                 "min number of rows in table to analyze",
1198                 &online_analyze_lower_limit,
1199 #if PG_VERSION_NUM >= 80400
1200                 online_analyze_lower_limit,
1201 #endif
1202                 0,
1203                 0x7fffffff,
1204                 PGC_USERSET,
1205 #if PG_VERSION_NUM >= 80400
1206                 GUC_NOT_IN_SAMPLE,
1207 #if PG_VERSION_NUM >= 90100
1208                 NULL,
1209 #endif
1210 #endif
1211                 NULL,
1212                 NULL
1213         );
1214
1215         RegisterXactCallback(removeTable, NULL);
1216 }
1217
1218 void _PG_fini(void);
1219 void
1220 _PG_fini(void)
1221 {
1222         ExecutorEnd_hook = oldExecutorEndHook;
1223 #if PG_VERSION_NUM >= 90200
1224         ProcessUtility_hook = oldProcessUtilityHook;
1225 #endif
1226
1227         if (excludeTables.tables)
1228                 free(excludeTables.tables);
1229         if (includeTables.tables)
1230                 free(includeTables.tables);
1231
1232         excludeTables.tables = includeTables.tables = NULL;
1233         excludeTables.nTables = includeTables.nTables = 0;
1234 }