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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-03-04 20:21:07 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-03-04 20:21:07 +0000 |
| commit | 5d5087363d7cdbd00fc432a1216e83a00f7139bd (patch) | |
| tree | 56492be3beb9be188f37bfa68c9bfc0e35b0961c /src/backend/executor/nodeHashjoin.c | |
| parent | 5592a6cf46d60187b6f4895d2144e67d4f54fa25 (diff) | |
| download | postgresql-5d5087363d7cdbd00fc432a1216e83a00f7139bd.tar.gz postgresql-5d5087363d7cdbd00fc432a1216e83a00f7139bd.zip | |
Replace the BufMgrLock with separate locks on the lookup hashtable and
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.
Diffstat (limited to 'src/backend/executor/nodeHashjoin.c')
0 files changed, 0 insertions, 0 deletions