cobbler Web UI scripts create excessive server CPU usage?
by Jacobson, Robert C. (GSFC-444.0)[HONEYWELL TECHNOLOGY SOLUTIONS INC]
Hi,
I had a problem the other day; my cobbler server (RHEL6.2,
cobbler-2.0.11-2.el6.noarch, cobbler-web-2.0.11-2.el6.noarch) was bogged
down quite a bit my httpd processes. Nearly all the CPU was being used.
I believe I have narrowed it down to the 4-or-5 tabs I had ;eft open to
the cobbler web interface. They were open for several hours at least
(maybe a day?). Restarting apache didn't resolve the issue -- the CPU
usage climbed very high again. But after I closed the tabs (and
restarted apache again), the CPU usage went back to idle.
It's odd -- just one tab consumes 4% CPU just sitting at the cobbler
home page. It appears that the pages execute periodic ajax queries. If
you have a lot of tabs open, those queries seem to add up and create a
bottleneck of some kind (???).
If I turn off Javascript in the browser, the CPU usage on the server
goes away.
Anyone else seeing this? Is there anything I can do on the server side
to alleviate this? Obviously I can avoid opening a bunch of tabs -- but
that's the way I like to work! :(
--
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Robert Jacobson Robert.C.Jacobson(a)nasa.gov
Lead System Admin Solar Dynamics Observatory (SDO)
Bldg 14, E222 (301) 286-1591