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| author | Teodor Sigaev <teodor@sigaev.ru> | 2018-03-30 14:23:17 +0300 |
|---|---|---|
| committer | Teodor Sigaev <teodor@sigaev.ru> | 2018-03-30 14:23:17 +0300 |
| commit | 43d1ed60fdd96027f044e152176c0d45cd6bf443 (patch) | |
| tree | b5efc150a6cfa4d5edbc5ecbc828850097d0201f /src/backend/access/gin/ginutil.c | |
| parent | 019fa576ca8298ecb7b8ded6e0c857840b57a4ae (diff) | |
| download | postgresql-43d1ed60fdd96027f044e152176c0d45cd6bf443.tar.gz postgresql-43d1ed60fdd96027f044e152176c0d45cd6bf443.zip | |
Predicate locking in GIN index
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
Diffstat (limited to 'src/backend/access/gin/ginutil.c')
| -rw-r--r-- | src/backend/access/gin/ginutil.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/access/gin/ginutil.c b/src/backend/access/gin/ginutil.c index 7bac7a12521..5632cc5a773 100644 --- a/src/backend/access/gin/ginutil.c +++ b/src/backend/access/gin/ginutil.c @@ -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); +} |