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Re: performance problem or not ?

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Assuming you're running with diskd/aufs rather than ufs then I think
your numbers are alright. The default caching rules are quite permissive
and result in less caching than what might be possible, but more
"correct" caching.

You've paid for a support contract via Redhat - I suggest talking to
them about it. :)



Adrian

On Mon, Aug 06, 2007, Jan-Frode Myklebust wrote:
> I'm running squid (squid-2.6.STABLE6-4.el5) on an old IBM x330
> server (2x 1266MHZ PIII, 1GB RAM, 2 mirrored 36GB disks for OS
> and 20GB squid-spool), serving set-top-boxes' access to the 
> internet.
> 
> We have a feel for the proxy maybe being slow, but can't really
> pinpoint what the problem might be. Could somebody please have 
> a look at the below numbers to see if something stands out as 
> a potential performance problem ?
> 
> Some stats from calamaris for the last 24 hours:
> 
> Proxy statistics  	
> -----------------
> Total amount:		requests	2818623
> unique hosts/users:	hosts		3427
> Total Bandwidth: 	Byte		15607M
> Max. Bandwidth usage:	MBit/sec	4.42
> Proxy efficiency (HIT [kB/sec] / DIRECT [kB/sec]): factor 10.45
> Average speed increase:	%		100.25
> TCP response time of 100%% requests:	msec	130
> 
> Cache statistics
> ----------------
> Total amount cached:	requests  	 2088373
> Request hit rate:	%		74.09
> Bandwidth savings:	Byte		8640M
> Bandwidth savings in Percent (Byte hit rate): 	% 	55.36
> Average cached object size: 	Byte 	4338
> Average direct object size: 	Byte 	10004
> Average object size:		Byte 	5806
> 
> Incoming request peak
> ---------------------
> 429/second
> 6439/minute
> 238080/hour
> 
> 
> TCP-Request duration distribution
> -----------------------------------------
> msec		hits	byte
> <= 10   	48%	23%
> <= 100  	85%	60%
> <= 1000		99%	86%
> 
> File descriptors in use by squid are normally between 50-150, with peaks of
> 200-1000 once a week.
> 
> CPU-usage is seldom above 10%, with 1-2% iowait and less than 1% system cpu.
> 
> 
> 
>    -jf

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