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| author | Bruce Momjian <bruce@momjian.us> | 1997-08-24 23:08:01 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 1997-08-24 23:08:01 +0000 |
| commit | c4cb617504a6e7990de0416b0d18d1dadf176d6c (patch) | |
| tree | b38bf26650cb9b6fb54a2a3df05624854f661a72 /src/backend/utils/cache/catcache.c | |
| parent | 281ba3f40d023dbe0b03f2d76f3c854c3232664f (diff) | |
| download | postgresql-c4cb617504a6e7990de0416b0d18d1dadf176d6c.tar.gz postgresql-c4cb617504a6e7990de0416b0d18d1dadf176d6c.zip | |
Major patch to speed up backend startup after profiling analysis.
Diffstat (limited to 'src/backend/utils/cache/catcache.c')
| -rw-r--r-- | src/backend/utils/cache/catcache.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/src/backend/utils/cache/catcache.c b/src/backend/utils/cache/catcache.c index 10289e03231..be7afe0a5f2 100644 --- a/src/backend/utils/cache/catcache.c +++ b/src/backend/utils/cache/catcache.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/cache/catcache.c,v 1.7 1997/08/19 21:34:58 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/cache/catcache.c,v 1.8 1997/08/24 23:07:42 momjian Exp $ * * Notes: * XXX This needs to use exception.h to handle recovery when @@ -656,8 +656,19 @@ InitSysCache(char *relname, * and the LRU tuple list * ---------------- */ - for (i = 0; i <= NCCBUCK; ++i) { - cp->cc_cache[i] = DLNewList(); + { + /* + * We can only do this optimization because the number of hash + * buckets never changes. Without it, we call malloc() too much. + * We could move this to dllist.c, but the way we do this is not + * dynamic/portabl, so why allow other routines to use it. + */ + void *cache_begin = malloc((NCCBUCK+1)*sizeof(Dllist)); + for (i = 0; i <= NCCBUCK; ++i) { + cp->cc_cache[i] = cache_begin + i * sizeof(Dllist); + cp->cc_cache[i]->dll_head = 0; + cp->cc_cache[i]->dll_tail = 0; + } } cp->cc_lrulist = DLNewList(); |