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Predicate locking in GIN index

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Predicate locks are used on per page basis only if fastupdate = off, in
opposite case predicate lock on pending list will effectively lock whole index,
to reduce locking overhead, just lock a relation. Entry and posting trees are
essentially B-tree, so locks are acquired on leaf pages only.

Author: Shubham Barai with some editorization by me and Dmitry Ivanov
Review by: Alexander Korotkov, Dmitry Ivanov, Fedor Sigaev
Discussion: https://www.postgresql.org/message-id/flat/CALxAEPt5sWW+EwTaKUGFL5_XFcZ0MuGBcyJ70oqbWqr42YKR8Q@mail.gmail.com
This commit is contained in:
Teodor Sigaev
2018-03-30 14:23:17 +03:00
parent 019fa576ca
commit 43d1ed60fd
11 changed files with 1054 additions and 18 deletions
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10
src/backend/access/gin/ginutil.c
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@ -23,6 +23,7 @@
#include "miscadmin.h"
#include "storage/indexfsm.h"
#include "storage/lmgr.h"
#include "storage/predicate.h"
#include "utils/builtins.h"
#include "utils/index_selfuncs.h"
#include "utils/typcache.h"
@ -49,7 +50,7 @@ ginhandler(PG_FUNCTION_ARGS)
amroutine->amsearchnulls = false;
amroutine->amstorage = true;
amroutine->amclusterable = false;
amroutine->ampredlocks = false;
amroutine->ampredlocks = true;
amroutine->amcanparallel = false;
amroutine->amkeytype = InvalidOid;
@ -716,3 +717,10 @@ ginUpdateStats(Relation index, const GinStatsData *stats)
END_CRIT_SECTION();
}
void
GinCheckForSerializableConflictIn(Relation relation, HeapTuple tuple, Buffer buffer)
{
if (!GinGetUseFastUpdate(relation))
CheckForSerializableConflictIn(relation, tuple, buffer);
}