fluencelabs/redis
1
0
Fork 0
mirror of https://github.com/fluencelabs/redis synced 2025-06-18 19:51:22 +00:00
Code Issues Projects Releases Wiki Activity

Sample and cache RSS in serverCron().

Browse Source 
Obtaining the RSS (Resident Set Size) info is slow in Linux and OSX.
This slowed down the generation of the INFO 'memory' section.

Since the RSS does not require to be a real-time measurement, we
now sample it with server.hz frequency (10 times per second by default)
and use this value both to show the INFO rss field and to compute the
fragmentation ratio.

Practically this does not make any difference for memory profiling of
Redis but speeds up the INFO call significantly.
This commit is contained in:
antirez
2014-03-24 12:00:20 +01:00
parent 72257f4b87
commit 4ebc7e3738
4 changed files with 10 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/zmalloc.c
View File

@ -321,8 +321,8 @@ size_t zmalloc_get_rss(void) {
#endif
/* Fragmentation = RSS / allocated-bytes */
float zmalloc_get_fragmentation_ratio(void) {
return (float)zmalloc_get_rss()/zmalloc_used_memory();
float zmalloc_get_fragmentation_ratio(size_t rss) {
return (float)rss/zmalloc_used_memory();
}
#if defined(HAVE_PROC_SMAPS)