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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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4
src/include/access/gin_private.h
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@ -103,6 +103,8 @@ extern Datum *ginExtractEntries(GinState *ginstate, OffsetNumber attnum,
extern OffsetNumber gintuple_get_attrnum(GinState *ginstate, IndexTuple tuple);
extern Datum gintuple_get_key(GinState *ginstate, IndexTuple tuple,
GinNullCategory *category);
extern void GinCheckForSerializableConflictIn(Relation relation,
HeapTuple tuple, Buffer buffer);
/* gininsert.c */
extern IndexBuildResult *ginbuild(Relation heap, Relation index,
@ -217,7 +219,7 @@ extern ItemPointer GinDataLeafPageGetItems(Page page, int *nitems, ItemPointerDa
extern int GinDataLeafPageGetItemsToTbm(Page page, TIDBitmap *tbm);
extern BlockNumber createPostingTree(Relation index,
ItemPointerData *items, uint32 nitems,
GinStatsData *buildStats);
GinStatsData *buildStats, Buffer entrybuffer);
extern void GinDataPageAddPostingItem(Page page, PostingItem *data, OffsetNumber offset);
extern void GinPageDeletePostingItem(Page page, OffsetNumber offset);
extern void ginInsertItemPointers(Relation index, BlockNumber rootBlkno,