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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2009-01-12 05:10:45 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2009-01-12 05:10:45 +0000 |
| commit | b7b8f0b6096d2ab6e4f67980d19e478cf6fab629 (patch) | |
| tree | b72f9703650b8fb051b516ba369c7cc929309004 /src/include/pg_config_manual.h | |
| parent | 1a37056a74e273085c39bb88cba48797695c067e (diff) | |
| download | postgresql-b7b8f0b6096d2ab6e4f67980d19e478cf6fab629.tar.gz | |
Implement prefetching via posix_fadvise() for bitmap index scans. A new
GUC variable effective_io_concurrency controls how many concurrent block
prefetch requests will be issued.
(The best way to handle this for plain index scans is still under debate,
so that part is not applied yet --- tgl)
Greg Stark
Diffstat (limited to 'src/include/pg_config_manual.h')
| -rw-r--r-- | src/include/pg_config_manual.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h index ff9d6ce45d..bc66df2eb3 100644 --- a/src/include/pg_config_manual.h +++ b/src/include/pg_config_manual.h @@ -6,7 +6,7 @@ * for developers. If you edit any of these, be sure to do a *full* * rebuild (and an initdb if noted). * - * $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.36 2009/01/11 18:02:17 tgl Exp $ + * $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.37 2009/01/12 05:10:45 tgl Exp $ *------------------------------------------------------------------------ */ @@ -136,6 +136,15 @@ #endif /* + * USE_PREFETCH code should be compiled only if we have a way to implement + * prefetching. (This is decoupled from USE_POSIX_FADVISE because there + * might in future be support for alternative low-level prefetch APIs.) + */ +#ifdef USE_POSIX_FADVISE +#define USE_PREFETCH +#endif + +/* * This is the default directory in which AF_UNIX socket files are * placed. Caution: changing this risks breaking your existing client * applications, which are likely to continue to look in the old |