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reverse proxy problem

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Hi guys,

Running latest 3.1 in a reverse proxy mode.  3 beefy servers with 96GB of ram.  Seeing an odd problem:

Origin -> customer, equals fast speeds.  (Tested by curling from a desktop to origin.)
Origin -> squid, equals fast speeds.  (Tested by running curl on the squid server to the origin.)
Squid cache hit -> customer, equals fast speed.  (Seen in browser.)
Squid cache miss -> customer, insanely slow.  36kB/sec, when origin to customer direct is like 50MB/sec.

Any ideas on what to look at here?  It's so broken it feels like a misconfiguration somewhere.

These are on RHEL6u2, 96GB ram, 1.69TB RAID5 ext4 partition for disk cache, 4gb of bonded network interface.  Machines are behind a load balancer operating in DSR mode.

Thanks in advance.

--
Bruce Z. Lysik <blysik@xxxxxxxxx>



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