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| author | Teodor Sigaev <teodor@sigaev.ru> | 2018-04-07 16:59:14 +0300 |
|---|---|---|
| committer | Teodor Sigaev <teodor@sigaev.ru> | 2018-04-07 16:59:14 +0300 |
| commit | b508a56f2f3a2d850e75a14661943d6b4dde8274 (patch) | |
| tree | 1c8e5b683669f19cf27606f472628fb162421bdd /src/backend/access/hash/hashinsert.c | |
| parent | 971d7ddbe19ad9525457e65d01b8b6504ab57cc4 (diff) | |
| download | postgresql-b508a56f2f3a2d850e75a14661943d6b4dde8274.tar.gz | |
Predicate locking in hash indexes.
Hash index searches acquire predicate locks on the primary
page of a bucket. It acquires a lock on both the old and new buckets
for scans that happen concurrently with page splits. During a bucket
split, a predicate lock is copied from the primary page of an old
bucket to the primary page of a new bucket.
Author: Shubham Barai, Amit Kapila
Reviewed by: Amit Kapila, Alexander Korotkov, Thomas Munro
Discussion: https://www.postgresql.org/message-id/flat/CALxAEPvNsM2GTiXdRgaaZ1Pjd1bs+sxfFsf7Ytr+iq+5JJoYXA@mail.gmail.com
Diffstat (limited to 'src/backend/access/hash/hashinsert.c')
| -rw-r--r-- | src/backend/access/hash/hashinsert.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/access/hash/hashinsert.c b/src/backend/access/hash/hashinsert.c index f121286b8c..3eb722ce26 100644 --- a/src/backend/access/hash/hashinsert.c +++ b/src/backend/access/hash/hashinsert.c @@ -22,6 +22,7 @@ #include "utils/rel.h" #include "storage/lwlock.h" #include "storage/buf_internals.h" +#include "storage/predicate.h" static void _hash_vacuum_one_page(Relation rel, Buffer metabuf, Buffer buf, RelFileNode hnode); @@ -88,6 +89,8 @@ restart_insert: &usedmetap); Assert(usedmetap != NULL); + CheckForSerializableConflictIn(rel, NULL, buf); + /* remember the primary bucket buffer to release the pin on it at end. */ bucket_buf = buf; |