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| -rw-r--r-- | cmogstored.x | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/cmogstored.x b/cmogstored.x index aa3167c..3fcc91b 100644 --- a/cmogstored.x +++ b/cmogstored.x @@ -15,6 +15,22 @@ MOG_IOSTAT_CMD - command-line for invoking iostat(1). This is used by the sidechannel to report disk utilization to trackers. Default: "iostat -dx 1 30" +See MALLOC TUNING for environment variables which may affect memory +usage. + +[MALLOC TUNING] + +malloc(3) implementations tuned for multithreading speed (and not memory +usage) may cause large amounts of metadata overhead in infrequently-used +arenas. While cmogstored may use many threads for filesystem I/O, +cmogstored is designed to not be dependent on malloc(3) performance nor +scalability. + +For on GNU/Linux systems with glibc, we recommend setting +MALLOC_ARENA_TEST and MALLOC_ARENA_MAX to low numbers to limit the +number arenas. Setting the value of each to 1 or 2 should be enough, +even. + [REPORTING BUGS] Only bug reports in plain-text email will be read. You may also report bugs publically to the MogileFS mailing list |