Re: [squid-users] cache removal procedure

On Mon, 20 Oct 2003, Pat Lendon wrote:

> Is it possible to set specific times to run cache removal (lru)?

No.

> Reason being, at random times the squid process cpu is a high 40% and
> greater. Sometimes the squid process uses 99% cpu, but this is more rare.
> Normally the squid process uses 10% or less of cpu.

This is most likely due to other causes. The LRU process is not CPU
intensive.

One candidate is half_closed_clients. If left on (the default) then Squid
will attempt to support half-closed connections, and on some OS:es under
certain conditions not yet fully identified this is reported to cause very
high CPU usage while such connection exists. So it might be worth to try

   half_closed_clients off

Also make sure you get the quick_abort_* settings correct.

> Should I switch the cache replacement policy from "lru" to GDSF or LFUDA ?

Probably not.

These policies use slightly more CPU, but can give a slightly better cache
hit ratio depending on the situation.

Regards
Henrik
Received on Mon Oct 20 2003 - 13:29:37 MDT