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.

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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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src/backend/storage/buffer/bufmgr.c

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