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Replace the BufMgrLock with separate locks on the lookup hashtable and

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the freelist, plus per-buffer spinlocks that protect access to individual
shared buffer headers.  This requires abandoning a global freelist (since
the freelist is a global contention point), which shoots down ARC and 2Q
as well as plain LRU management.  Adopt a clock sweep algorithm instead.
Preliminary results show substantial improvement in multi-backend situations.
This commit is contained in:
Tom Lane
2005-03-04 20:21:07 +00:00
parent 5592a6cf46
commit 5d5087363d
18 changed files with 1410 additions and 1932 deletions
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3
src/backend/catalog/index.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.244 2005/01/10 20:02:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.245 2005/03/04 20:21:05 tgl Exp $
*
*
* INTERFACE ROUTINES
@@ -1060,7 +1060,6 @@ setRelhasindex(Oid relid, bool hasindex, bool isprimary, Oid reltoastidxid)
/* Send out shared cache inval if necessary */
if (!IsBootstrapProcessingMode())
CacheInvalidateHeapTuple(pg_class, tuple);
BufferSync(-1, -1);
}
else if (dirty)
{