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Initialize index stats during parallel VACUUM.

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Initialize shared memory allocated for index stats to avoid a hard
crash.  This was possible when parallel VACUUM became confused about the
current phase of index processing.

Oversight in commit 8e1fae1938, which refactored parallel VACUUM.

Author: Masahiko Sawada <sawada.mshk@gmail.com>
Reported-By: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20220818133406.GL26426@telsasoft.com
Backpatch: 15-, the first version with the refactoring commit.
This commit is contained in:
Peter Geoghegan 2022-08-18 17:34:14 -07:00
parent d9fbb88629
commit 662ba729a6
1 changed files with 1 additions and 0 deletions
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src/backend/commands/vacuumparallel.c
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@ -317,6 +317,7 @@ parallel_vacuum_init(Relation rel, Relation *indrels, int nindexes,
/* Prepare index vacuum stats */ /* Prepare index vacuum stats */
indstats = (PVIndStats *) shm_toc_allocate(pcxt->toc, est_indstats_len); indstats = (PVIndStats *) shm_toc_allocate(pcxt->toc, est_indstats_len);
MemSet(indstats, 0, est_indstats_len);
for (int i = 0; i < nindexes; i++) for (int i = 0; i < nindexes; i++)
{ {
Relation indrel = indrels[i]; Relation indrel = indrels[i];