[OpenIndiana-discuss] Crossbow performance & bit rot
jason at broken.net
Wed Dec 21 19:31:06 UTC 2011
I have four web servers running two ip exclusive zones where nginx is the
primary application. The systems have 16gb of ram, 1 L5630, on Intel S5500UR
motherboards with onboard 82575EB Ethernet controllers.
The load from the internet comes via round robin DNS. The four servers divvy
up a high transaction load of very short lived connections. The outbound
packet rate from the router to the four servers ranges between 15k and 60k
packets per second.
After one week of operation, response times talking to the back end (the
only location which I measure) started creeping up from sub 1ms to peaks of
I have isolated the problem to crossbow on the web tier. It seems that the
only thing that makes the high response times go away is to halt the zones,
delete the vnic, re-create it and boot the zones. Rebooting just the zone
has no effect of the response times. Is there some kind of bit-rot in
Crossbow? Is this a new bug?
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