05-13-2012
Mailbox server performance issue
Hi.
my company's mailbox server has severe performance issue on the days while full backup is running. There is huge I/O in another "mail replication process" for standby servers ( which runs all the time, every 15 mins. ).
specs of servers :- RHEL5.5 , kernel -2.6.18-53.1.6.el5 , 8 core Intel Xeon 2.66 GHz, 32 GB RAM.24 GB VM.
strangely I see
swappiness =0 ( proposing it to be 50 )
HugePages_Total: 0 ( proposing it to be 100 )
HugePages_Free: 0
HugePages_Rsvd: 0
Hugepagesize: 2048 kB ( proposing it to be 4096 )
-- proposing to configure memlock for mailbox process as well .
Before proposing to higher management for change in these settings to an optimized value, I wanted to confirm and take suggestions about this issue and few other parameters which could be adjusted.
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LEARN ABOUT XFREE86
x11perfcomp
X11PERFCOMP(1) General Commands Manual X11PERFCOMP(1)
NAME
x11perfcomp - X11 server performance comparison program
SYNTAX
x11perfcomp [ -r | -ro ] [ -l label_file ] files
DESCRIPTION
The x11perfcomp program merges the output of several x11perf(1) runs into a nice tabular format. It takes the results in each file, fills
in any missing test results if necessary, and for each test shows the objects/second rate of each server. If invoked with the -r or -ro
options, it shows the relative performance of each server to the first server.
Normally, x11perfcomp uses the first file specified to determine which specific tests it should report on. Some (non-DEC :) servers may
fail to perform all tests. In this case, x11perfcomp automatically substitutes in a rate of 0.0 objects/second. Since the first file
determines which tests to report on, this file must contain a superset of the tests reported in the other files, else x11perfcomp will
fail.
You can provide an explicit list of tests to report on by using the -l switch to specify a file of labels. You can create a label file by
using the -label option in x11perf.
OPTIONS
x11perfcomp accepts the options listed below:
-r Specifies that the output should also include relative server performance.
-ro Specifies that the output should include only relative server performance.
-l label_file Specifies a label file to use.
X DEFAULTS
There are no X defaults used by this program.
SEE ALSO
X(7), x11perf(1)
AUTHORS
Mark Moraes wrote the original scripts to compare servers.
Joel McCormack just munged them together a bit.
XFree86 Version 4.7.0 X11PERFCOMP(1)