#include "postgres.h"
#include "pgstat.h"
+#include "access/transam.h"
#include "catalog/namespace.h"
#include "commands/vacuum.h"
#include "executor/executor.h"
static int online_analyze_threshold = 50;
static int online_analyze_capacity_threshold = 100000;
static double online_analyze_min_interval = 10000;
+static int online_analyze_lower_limit = 0;
static ExecutorEnd_hook_type oldExecutorEndHook = NULL;
#if PG_VERSION_NUM >= 90200
static ProcessUtility_hook_type oldProcessUtilityHook = NULL;
#endif
+typedef enum CmdKind
+{
+ CK_SELECT = CMD_SELECT,
+ CK_UPDATE = CMD_UPDATE,
+ CK_INSERT = CMD_INSERT,
+ CK_DELETE = CMD_DELETE,
+ CK_TRUNCATE,
+ CK_FASTTRUNCATE,
+ CK_CREATE,
+ CK_ANALYZE,
+ CK_VACUUM
+} CmdKind;
+
+
typedef enum
{
OATT_ALL = 0x03,
#endif
static void
-makeAnalyze(Oid relOid, CmdType operation, int32 naffected)
+makeAnalyze(Oid relOid, CmdKind operation, int64 naffected)
{
TimestampTz now = GetCurrentTimestamp();
Relation rel;
else
rstat = &dummyrstat; /* found == false for following if */
- if (found == false || rstat->rereadStat == true || naffected == 0)
+ if (!found)
+ {
+ MemSet(rstat, 0, sizeof(*rstat));
+ rstat->tableid = relOid;
+ newTable = true;
+ }
+ else if (operation == CK_VACUUM)
+ {
+ /* force reread becouse vacuum could change n_tuples */
+ rstat->rereadStat = true;
+ return;
+ }
+ else if (operation == CK_ANALYZE)
{
+ /* only analyze */
+ rstat->changes_since_analyze = 0;
+ return;
+ }
- if (!found)
- {
- MemSet(rstat, 0, sizeof(*rstat));
- rstat->tableid = relOid;
- }
- Assert(rstat->tableid == relOid);
+ Assert(rstat->tableid == relOid);
+
+ /* do not rered data if it was a truncation */
+ if (operation != CK_TRUNCATE && operation != CK_FASTTRUNCATE &&
+ (newTable == true || rstat->rereadStat == true))
+ {
+ rstat->rereadStat = false;
tabentry = pgstat_fetch_stat_tabentry(relOid);
rstat->autovac_analyze_timestamp =
tabentry->autovac_analyze_timestamp;
rstat->analyze_timestamp = tabentry->analyze_timestamp;
- rstat->rereadStat = false;
- }
- else
- {
- newTable = true;
- rstat->rereadStat = true;
}
}
- if (newTable || (
+ if (newTable ||
+ /* force analyze after truncate, fasttruncate already did analyze */
+ operation == CK_TRUNCATE || (
/* do not analyze too often, if both stamps are exceeded the go */
TimestampDifferenceExceeds(rstat->analyze_timestamp, now, online_analyze_min_interval) &&
TimestampDifferenceExceeds(rstat->autovac_analyze_timestamp, now, online_analyze_min_interval) &&
+ /* do not analyze too small tables */
+ rstat->n_tuples + rstat->changes_since_analyze + naffected > online_analyze_lower_limit &&
/* be in sync with relation_needs_vacanalyze */
((double)(rstat->changes_since_analyze + naffected)) >=
online_analyze_scale_factor * ((double)rstat->n_tuples) +
rstat->autovac_analyze_timestamp = now;
rstat->changes_since_analyze = 0;
- rstat->rereadStat = true;
+
+ switch(operation)
+ {
+ case CK_CREATE:
+ case CK_INSERT:
+ case CK_UPDATE:
+ rstat->n_tuples += naffected;
+ case CK_DELETE:
+ rstat->rereadStat = (reltype == OATT_PERSISTENT);
+ break;
+ case CK_TRUNCATE:
+ case CK_FASTTRUNCATE:
+ rstat->rereadStat = false;
+ rstat->n_tuples = 0;
+ break;
+ default:
+ break;
+ }
/* update last analyze timestamp in local memory of backend */
if (tabentry)
if (tabentry)
tabentry->changes_since_analyze += naffected;
#endif
- rstat->changes_since_analyze += naffected;
+ switch(operation)
+ {
+ case CK_CREATE:
+ case CK_INSERT:
+ rstat->changes_since_analyze += naffected;
+ rstat->n_tuples += naffected;
+ break;
+ case CK_UPDATE:
+ rstat->changes_since_analyze += 2 * naffected;
+ rstat->n_tuples += naffected;
+ case CK_DELETE:
+ rstat->changes_since_analyze += naffected;
+ break;
+ case CK_TRUNCATE:
+ case CK_FASTTRUNCATE:
+ rstat->changes_since_analyze = 0;
+ rstat->n_tuples = 0;
+ break;
+ default:
+ break;
+ }
}
/* Reset local cache if we are over limit */
relstatsInit();
}
+static Const*
+isFastTruncateCall(QueryDesc *queryDesc)
+{
+ TargetEntry *te;
+ FuncExpr *fe;
+ Const *constval;
+
+ if (!(
+ queryDesc->plannedstmt &&
+ queryDesc->operation == CMD_SELECT &&
+ queryDesc->plannedstmt->planTree &&
+ queryDesc->plannedstmt->planTree->targetlist &&
+ list_length(queryDesc->plannedstmt->planTree->targetlist) == 1 &&
+ IsA(linitial(queryDesc->plannedstmt->planTree->targetlist), TargetEntry)
+ ))
+ return NULL;
+
+ te = linitial(queryDesc->plannedstmt->planTree->targetlist);
+
+ if (!IsA(te, TargetEntry))
+ return NULL;
+
+ fe = (FuncExpr*)te->expr;
+
+ if (!(
+ fe && IsA(fe, FuncExpr) &&
+ fe->funcid >= FirstNormalObjectId &&
+ fe->funcretset == false &&
+ fe->funcresulttype == VOIDOID &&
+ fe->funcvariadic == false &&
+ list_length(fe->args) == 1 &&
+ IsA(linitial(fe->args), Const)
+ ))
+ return NULL;
+
+ constval = linitial(fe->args);
+
+ if (!(
+ IsA(constval,Const) &&
+ constval->consttype == TEXTOID &&
+ strcmp(get_func_name(fe->funcid), "fasttruncate") == 0
+ ))
+ return NULL;
+
+ return constval;
+}
+
+
+
extern PGDLLIMPORT void onlineAnalyzeHooker(QueryDesc *queryDesc);
void
onlineAnalyzeHooker(QueryDesc *queryDesc)
{
- uint32 naffected = -1;
+ int64 naffected = -1;
+ Const *constval;
if (queryDesc->estate)
naffected = queryDesc->estate->es_processed;
+#if PG_VERSION_NUM >= 90200
+ if (online_analyze_enable &&
+ (constval = isFastTruncateCall(queryDesc)) != NULL)
+ {
+ Datum tblnamed = constval->constvalue;
+ char *tblname = text_to_cstring(DatumGetTextP(tblnamed));
+ RangeVar *tblvar =
+ makeRangeVarFromNameList(stringToQualifiedNameList(tblname));
+
+ makeAnalyze(RangeVarGetRelid(tblvar,
+ NoLock,
+ false),
+ CK_FASTTRUNCATE, -1);
+ }
+#endif
+
if (online_analyze_enable && queryDesc->plannedstmt &&
(queryDesc->operation == CMD_INSERT ||
queryDesc->operation == CMD_UPDATE ||
RangeTblEntry *rte = list_nth(queryDesc->plannedstmt->rtable, n-1);
if (rte->rtekind == RTE_RELATION)
- makeAnalyze(rte->relid, queryDesc->operation, naffected);
+ makeAnalyze(rte->relid, (CmdKind)queryDesc->operation, naffected);
}
}
}
ParamListInfo params, bool isTopLevel,
#endif
DestReceiver *dest, char *completionTag) {
- RangeVar *tblname = NULL;
+ List *tblnames = NIL;
+ CmdKind op = CK_INSERT;
#if PG_VERSION_NUM >= 100000
Node *parsetree = NULL;
parsetree = pstmt->utilityStmt;
#endif
- if (parsetree && IsA(parsetree, CreateTableAsStmt) &&
- ((CreateTableAsStmt*)parsetree)->into &&
- online_analyze_enable)
- tblname = (RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel);
+ if (parsetree && online_analyze_enable)
+ {
+ if (IsA(parsetree, CreateTableAsStmt) &&
+ ((CreateTableAsStmt*)parsetree)->into)
+ {
+ tblnames =
+ list_make1((RangeVar*)copyObject(((CreateTableAsStmt*)parsetree)->into->rel));
+ op = CK_CREATE;
+ }
+ else if (IsA(parsetree, TruncateStmt))
+ {
+ tblnames = list_copy(((TruncateStmt*)parsetree)->relations);
+ op = CK_TRUNCATE;
+ }
+ else if (IsA(parsetree, VacuumStmt))
+ {
+ VacuumStmt *vac = (VacuumStmt*)parsetree;
+
+ tblnames = list_make1(vac->relation);
+
+ if (vac->options & (VACOPT_VACUUM | VACOPT_FULL | VACOPT_FREEZE))
+ /* optionally with analyze */
+ op = CK_VACUUM;
+ else if (vac->options & VACOPT_ANALYZE)
+ op = CK_ANALYZE;
+ else
+ tblnames = NIL;
+ }
+ }
#if PG_VERSION_NUM >= 100000
#define parsetree pstmt
#undef parsetree
#endif
- if (tblname) {
- Oid tblOid = RangeVarGetRelid(tblname, NoLock, true);
+ if (tblnames) {
+ ListCell *l;
- makeAnalyze(tblOid, CMD_INSERT, -1);
+ foreach(l, tblnames)
+ {
+ RangeVar *tblname = (RangeVar*)lfirst(l);
+ Oid tblOid = RangeVarGetRelid(tblname, NoLock, true);
+
+ makeAnalyze(tblOid, op, -1);
+ }
}
}
#endif
#endif
includeTablesShow
);
+
+ DefineCustomIntVariable(
+ "online_analyze.lower_limit",
+ "min number of rows in table to analyze",
+ "min number of rows in table to analyze",
+ &online_analyze_lower_limit,
+#if PG_VERSION_NUM >= 80400
+ online_analyze_lower_limit,
+#endif
+ 0,
+ 0x7fffffff,
+ PGC_USERSET,
+#if PG_VERSION_NUM >= 80400
+ GUC_NOT_IN_SAMPLE,
+#if PG_VERSION_NUM >= 90100
+ NULL,
+#endif
+#endif
+ NULL,
+ NULL
+ );
+
}
void _PG_fini(void);
projects / online_analyze.git / blobdiff