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postgres/src
Tom Lane a615acf555 Arrange for read-only accesses to SLRU page buffers to take only a shared
lock, not exclusive, if the desired page is already in memory.  This can
be demonstrated to be a significant win on the pg_subtrans cache when there
is a large window of open transactions.  It should be useful for pg_clog
as well.  I didn't try to make GetMultiXactIdMembers() use the code, as
that would have taken some restructuring, and what with the local cache
for multixact contents it probably wouldn't really make a difference.
Per my recent proposal.
2005-12-06 18:10:06 +00:00
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2005-07-30 03:07:42 +00:00
2005-10-15 02:49:52 +00:00
2004-06-01 03:32:42 +00:00