I have two mostly idle Xen VMs, A and B. Nagios is alerting of 10 second timeouts when GETting a static file from A (client) to a vhost on B, but this affects only some virtual servers. The files are static HTML and we're not requesting any referenced files.
The issue only appears to be between these two hosts - requesting the same file from my ADSL connection shows no such delay. The delay is quite reliable; HTTP GETs for a tiny file on a delayed host come in around the 10.008s mark, while GETs on a non-delayed host show consistent times which are 10,000 ms less. Apache on B is Apache2-mpm-prefork 2.2.4-3ubuntu0.1. SSI is turned off, as are DNS lookups for logging. I'm not using GeoIP on this host. Apache configs for a site which does delay, and another site which reliably doesn't delay, are identical in all respects except for hostname and directories. Has anyone seen something similar? My first thought was DNS, but I'm suspecting it's actually related to the network between the Xen hosts. There's no measurable delay in looking up the requesting hostname from the server (I've added it to /etc/hosts now, but that made no change). What might introduce a 10,000ms delay to HTTP? --~--~---------~--~----~------------~-------~--~----~ NZ PHP Users Group: http://groups.google.com/group/nzphpug To post, send email to [email protected] To unsubscribe, send email to [email protected] -~----------~----~----~----~------~----~------~--~---
