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From Hung Nguyen <it.bi.ngu...@gmail.com>
Subject Too many context switching on ATS
Date Tue, 03 Jul 2012 10:39:54 GMT
Dear guys,

I do some test cases on 2 servers which installed Traffic server as reverse
proxy.

- Box 1: using SSD disk which using 15GB for disk cache, 15GB ram cache
- Box 2: using SAS disk which using 4GB for disk cache, 4 GB ram cache


On box 1 I got about 10K context switch


-- trafficserver]# tsar --pcsw -i 1 -l
Time        -------pcsw-----
Time         cswch    proc
03/07-17:31  10.2K     0.0
03/07-17:31  10.7K     6.0
03/07-17:31  10.4K    61.0


On box 2:
 tsar --pcsw -i 1 -l
Time        -------pcsw-----
Time         cswch    proc
03/07-17:32   4.5K     0.0
03/07-17:32   5.0K     0.0
03/07-17:32   4.4K     0.0


is there any reason cause ATS create many context switches on server?

---
Hung. Nguyen Van
Website: http://ethicconsultant.com

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