diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/pg_config_manual.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h index a1a93ad706e..8a6e67a445d 100644 --- a/src/include/pg_config_manual.h +++ b/src/include/pg_config_manual.h @@ -217,13 +217,13 @@ #define DEFAULT_EVENT_SOURCE "PostgreSQL" /* - * Assumed cache line size. This doesn't affect correctness, but can be used - * for low-level optimizations. Currently, this is used to pad some data - * structures in xlog.c, to ensure that highly-contended fields are on - * different cache lines. Too small a value can hurt performance due to false - * sharing, while the only downside of too large a value is a few bytes of - * wasted memory. The default is 128, which should be large enough for all - * supported platforms. + * Assumed cache line size. This doesn't affect correctness, but can be used + * for low-level optimizations. This is mostly used to pad various data + * structures, to ensure that highly-contended fields are on different cache + * lines. Too small a value can hurt performance due to false sharing, while + * the only downside of too large a value is a few bytes of wasted memory. + * The default is 128, which should be large enough for all supported + * platforms. */ #define PG_CACHE_LINE_SIZE 128 |