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Scan the buffer pool just once, not once per fork, during relation drop.

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This provides a speedup of about 4X when NBuffers is large enough.
There is also a useful reduction in sinval traffic, since we
only do CacheInvalidateSmgr() once not once per fork.

Simon Riggs, reviewed and somewhat revised by Tom Lane
This commit is contained in:
Tom Lane
2012-06-07 17:42:27 -04:00
parent 5baf6da717
commit ece01aae47
9 changed files with 150 additions and 23 deletions
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src/include/storage/bufmgr.h
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@@ -188,6 +188,7 @@ extern void FlushRelationBuffers(Relation rel);
extern void FlushDatabaseBuffers(Oid dbid);
extern void DropRelFileNodeBuffers(RelFileNodeBackend rnode,
ForkNumber forkNum, BlockNumber firstDelBlock);
extern void DropRelFileNodeAllBuffers(RelFileNodeBackend rnode);
extern void DropDatabaseBuffers(Oid dbid);
#define RelationGetNumberOfBlocks(reln) \