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Extend relations multiple blocks at a time to improve scalability.

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Contention on the relation extension lock can become quite fierce when
multiple processes are inserting data into the same relation at the same
time at a high rate.  Experimentation shows the extending the relation
multiple blocks at a time improves scalability.

Dilip Kumar, reviewed by Petr Jelinek, Amit Kapila, and me.
This commit is contained in:
Robert Haas
2016-04-08 02:04:46 -04:00
parent 8643b91ecf
commit 719c84c1be
7 changed files with 271 additions and 3 deletions
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src/include/storage/lock.h
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@@ -574,6 +574,8 @@ extern void RememberSimpleDeadLock(PGPROC *proc1,
PGPROC *proc2);
extern void InitDeadLockChecking(void);
extern int LockWaiterCount(const LOCKTAG *locktag);
#ifdef LOCK_DEBUG
extern void DumpLocks(PGPROC *proc);
extern void DumpAllLocks(void);