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<p>HI,</p>
<p>On one of the server we are noticing high %sy usage due to which server is very slow. We have configured one of file system with xfs which is used to store mail queue.</p>
<p><span>Below is the iostat output on one of the instance when there is high %sy usage</span></p>
<p><span style="font-family: 'courier new', courier; white-space: pre-wrap;">avg-cpu: %user %nice %system %iowait %steal %idle</span></p>
<pre class="bbcodeblock" dir="ltr"><span style="font-family: 'courier new', courier;"> 0.01 0.00 48.26 0.01 0.00 51.73
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
cciss/c0d0 0.00 16.99 0.00 8.36 0.00 414.90 99.30 0.77 92.57 46.30 38.69
cciss/c0d0p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
cciss/c0d0p2 0.00 0.00 0.00 6.13 0.00 338.02 110.32 0.77 126.18 63.09 38.66
cciss/c0d0p3 0.00 0.28 0.00 0.84 0.00 4.46 10.67 0.00 0.33 0.33 0.03
cciss/c0d0p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
cciss/c0d0p5 0.00 0.56 0.00 0.28 0.00 3.34 24.00 0.00 0.00 0.00 0.00
cciss/c0d0p6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
cciss/c0d0p7 0.00 11.42 0.00 0.56 0.00 47.91 172.00 0.00 0.00 0.00 0.00
cciss/c0d0p8 0.00 4.74 0.00 0.56 0.00 21.17 76.00 0.00 0.00 0.00 0.00<br /><br /></span></pre>
<pre class="bbcodeblock" dir="ltr"><span style="font-family: 'courier new', courier;">~]# xfs_info /dev/cciss/c0d0p2
meta-data=/dev/cciss/c0d0p2 isize=256 agcount=16, agsize=163787 blks
= sectsz=512 attr=1
data = bsize=4096 blocks=2620592, imaxpct=25
= sunit=0 swidth=0 blks, unwritten=1
naming =version 2 bsize=4096
log =internal bsize=4096 blocks=2560, version=1
= sectsz=512 sunit=0 blks, lazy-count=0
realtime =none extsz=4096 blocks=0, rtextents=0</span></pre>
<p>Are we facing any performance issue with xfs. Please let me know</p>
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<pre>-- <br />Regards,
Aravind M D
</pre>
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