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New func _vc_scanoneind: scan one index relation to update statistic 

in pg_class if no one page was reapped by vacuum.
This commit is contained in:
Vadim B. Mikheev 1997-01-29 02:59:03 +00:00
parent f3c3458b1d
commit daf75276d4
1 changed files with 63 additions and 13 deletions
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76
src/backend/commands/vacuum.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.17 1997/01/25 19:29:36 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.18 1997/01/29 02:59:03 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -68,6 +68,7 @@ static void _vc_rpfheap (VRelList curvrl, Relation onerel, VPageList Vvpl, VPage
static void _vc_vacheap (VRelList curvrl, Relation onerel, VPageList vpl);
static void _vc_vacpage (Page page, VPageDescr vpd, Relation archrel);
static void _vc_vaconeind (VPageList vpl, Relation indrel, int nhtups);
static void _vc_scanoneind (Relation indrel, int nhtups);
static void _vc_updstats(Oid relid, int npages, int ntuples, bool hasindex);
static void _vc_setpagelock(Relation rel, BlockNumber blkno);
static VPageDescr _vc_tidreapped (ItemPointer itemptr, VPageList curvrl);
@ -400,34 +401,38 @@ _vc_vacone (VRelList curvrl)
Vvpl.vpl_npages = Fvpl.vpl_npages = 0;
_vc_scanheap(curvrl, onerel, &Vvpl, &Fvpl);
/* Now open/count indices */
/* Now open indices */
Irel = (Relation *) NULL;
if ( Vvpl.vpl_npages > 0 )
/* Open all indices of this relation */
_vc_getindices(curvrl->vrl_relid, &nindices, &Irel);
else
/* Count indices only */
_vc_getindices(curvrl->vrl_relid, &nindices, NULL);
_vc_getindices(curvrl->vrl_relid, &nindices, &Irel);
if ( nindices > 0 )
curvrl->vrl_hasindex = true;
else
curvrl->vrl_hasindex = false;
/* Clean index' relation(s) */
/* Clean/scan index relation(s) */
if ( Irel != (Relation*) NULL )
{
for (i = 0; i < nindices; i++)
_vc_vaconeind (&Vvpl, Irel[i], curvrl->vrl_ntups);
if ( Vvpl.vpl_npages > 0 )
{
for (i = 0; i < nindices; i++)
_vc_vaconeind (&Vvpl, Irel[i], curvrl->vrl_ntups);
}
else /* just scan indices to update statistic */
{
for (i = 0; i < nindices; i++)
_vc_scanoneind (Irel[i], curvrl->vrl_ntups);
}
}
if ( Fvpl.vpl_npages > 0 ) /* Try to shrink heap */
_vc_rpfheap (curvrl, onerel, &Vvpl, &Fvpl, nindices, Irel);
else if ( Vvpl.vpl_npages > 0 ) /* Clean pages from Vvpl list */
else
{
if ( Irel != (Relation*) NULL )
_vc_clsindices (nindices, Irel);
_vc_vacheap (curvrl, onerel, &Vvpl);
if ( Vvpl.vpl_npages > 0 ) /* Clean pages from Vvpl list */
_vc_vacheap (curvrl, onerel, &Vvpl);
}
/* ok - free Vvpl list of reapped pages */
@ -1266,6 +1271,51 @@ _vc_vacpage (Page page, VPageDescr vpd, Relation archrel)
} /* _vc_vacpage */
/*
* _vc_scanoneind() -- scan one index relation to update statistic.
*
*/
static void
_vc_scanoneind (Relation indrel, int nhtups)
{
RetrieveIndexResult res;
IndexScanDesc iscan;
int nitups;
int nipages;
struct rusage ru0, ru1;
getrusage(RUSAGE_SELF, &ru0);
/* walk through the entire index */
iscan = index_beginscan(indrel, false, 0, (ScanKey) NULL);
nitups = 0;
while ((res = index_getnext(iscan, ForwardScanDirection))
!= (RetrieveIndexResult) NULL)
{
nitups++;
pfree(res);
}
index_endscan(iscan);
/* now update statistics in pg_class */
nipages = RelationGetNumberOfBlocks(indrel);
_vc_updstats(indrel->rd_id, nipages, nitups, false);
getrusage(RUSAGE_SELF, &ru1);
elog (MESSLEV, "Ind %.*s: Pages %u; Tuples %u. Elapsed %u/%u sec.",
NAMEDATALEN, indrel->rd_rel->relname.data, nipages, nitups,
ru1.ru_stime.tv_sec - ru0.ru_stime.tv_sec,
ru1.ru_utime.tv_sec - ru0.ru_utime.tv_sec);
if ( nitups != nhtups )
elog (NOTICE, "NUMBER OF INDEX' TUPLES (%u) IS NOT THE SAME AS HEAP' (%u)",
nitups, nhtups);
} /* _vc_scanoneind */
/*
* _vc_vaconeind() -- vacuum one index relation.
*