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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/smgr.h
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@@ -80,8 +80,8 @@ extern void smgrclose(SMgrRelation reln);
extern void smgrcloseall(void);
extern void smgrclosenode(RelFileNodeBackend rnode);
extern void smgrcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo);
extern void smgrdounlink(SMgrRelation reln, ForkNumber forknum,
bool isRedo);
extern void smgrdounlink(SMgrRelation reln, bool isRedo);
extern void smgrdounlinkfork(SMgrRelation reln, ForkNumber forknum, bool isRedo);
extern void smgrextend(SMgrRelation reln, ForkNumber forknum,
BlockNumber blocknum, char *buffer, bool skipFsync);
extern void smgrprefetch(SMgrRelation reln, ForkNumber forknum,