Обсуждение: pgsql-server/src backend/access/transam/Makefi ...
pgsql-server/src backend/access/transam/Makefi ...
От
momjian@svr1.postgresql.org (Bruce Momjian)
Дата:
CVSROOT: /cvsroot Module name: pgsql-server Changes by: momjian@svr1.postgresql.org 03/06/11 19:37:46 Modified files: src/backend/access/transam: Makefile clog.c src/backend/storage/lmgr: lwlock.c src/include/storage: lwlock.h Added files: src/backend/access/transam: slru.c src/include/access: slru.h Log message: This patch extracts page buffer pooling and the simple least-recently-used strategy from clog.c into slru.c. It doesn't change any visible behaviour and passes all regression tests plus a TruncateCLOG test done manually. Apart from refactoring I made a little change to SlruRecentlyUsed, formerly ClogRecentlyUsed: It now skips incrementing lru_counts, if slotno is already the LRU slot, thus saving a few CPU cycles. To make this work, lru_counts are initialised to 1 in SimpleLruInit. SimpleLru will be used by pg_subtrans (part of the nested transactions project), so the main purpose of this patch is to avoid future code duplication. Manfred Koizar