Re: Is my squid too slow ?

Your machine is definately going into swap. To improve performance,
you're going to have to reduce the amount of memory the machine is using.
You can cut down the size of the memory cache. Right now, you have it set
to 40MB, if you cut it down to 16MB or so, that should help keep the
system from swapping. It is much more important to keep squid from
swapping than giving it a large memory cache

Your storage LRU time is also at a minimum, if you increase the size of
the cache, your hit rates should go up. I would at least double your
cache size from 500MB to 1GB, but this will increase your memory usage.

-Dave

On Tue, Mar 14, 2000 at 11:36:16AM +0100, Magali BERNARD wrote:
>
> After reading squid FAQ, I'd like to know more about good configuration
> of a proxy server with squid. Mine is running for some years, but I still
> have reticent users who affirm squid is too slow.
>
> My configuration:
>
> Dec Aplha 3000 - M600
> Digital UNIX V4.0E
> 192 Mb RAM
> Swap 500 MB
>
> squid-2.3.STABLE1 (configure option --enable-dlmalloc)
> cache_mem 40 Mb
> cache_dir 4000 (2*2000) Mb
> Restart and logfile_rotate every week
> Approximately 1200 clients, request hit 35-40%, byte hit 20%
>
> Now for the questions:
> - "swapon -s": In-use space is growing from 5-10% up to 25-30% at the
> end of the week. Is this alarming ? Do I really need to restart squid
> every day ?
>
> - From the Cache Manager, I see "Storage LRU Expiration Age: 3.96 days"
> It can be very lower (2 days or so) at the end of the week. Do I need
> to increase cache_dir ?
>
> - From the Cache Manager, I see the ratio "Page faults with physical i/o"
> / "Number of HTTP requests received" growing from 0.07 to 0.2-0.3
> According to Squid FAQ, it's not good...
>
> I'm waiting for any suggestion, or comparison criteria.
>
> An example of my Cache Manager/General Runtime Information:
>
> ---------- CUT ---------
> Squid Object Cache: Version 2.3.STABLE1
>
> Start Time:
> Mon, 13 Mar 2000 00:02:26 GMT
> Current Time:
> Tue, 14 Mar 2000 10:28:09 GMT
>
>
> Connection information for squid:
> Number of clients accessing cache: 849
> Number of HTTP requests received: 817386
> Number of ICP messages received: 0
> Number of ICP messages sent: 0
> Number of queued ICP replies: 0
> Request failure ratio: 0.0000000000000%
> HTTP requests per minute: 395.7
> ICP messages per minute: 0.0
> Select loop called: 6325854 times, 19.593 ms avg
> Cache information for squid:
> Request Hit Ratios: 5min: 35.5%, 60min: 36.1%
> Byte Hit Ratios: 5min: 14.7%, 60min: 20.1%
> Storage Swap size: 3728637 KB
> Storage Mem size: 40956 KB
> Storage LRU Expiration Age: 3.95 days
> Mean Object Size: 9.97 KB
> Requests given to unlinkd: 234295
> Median Service Times (seconds) 5 min 60 min:
> HTTP Requests (All): 0.72387 0.42149
> Cache Misses: 1.54242 0.89858
> Cache Hits: 0.18699 0.12783
> Near Hits: 2.02066 0.72387
> Not-Modified Replies: 0.20843 0.10857
> DNS Lookups: 0.19488 0.15593
> ICP Queries: 0.00000 0.00000
> Resource usage for squid:
> UP Time: 123942.644 seconds
> CPU Time: 17334.464 seconds
> CPU Usage: 13.99%
> CPU Usage, 5 minute avg: 32.89%
> CPU Usage, 60 minute avg: 36.14%
> Maximum Resident Size: 103304 KB
> Page faults with physical i/o: 107882
> Memory usage for squid via mallinfo():
> Total space in arena: 118450 KB
> Ordinary blocks: 114671 KB 1720 blks
> Small blocks: 0 KB 0 blks
> Holding blocks: 1224 KB 2 blks
> Free Small blocks: 0 KB
> Free Ordinary blocks: 3779 KB
> Total in use: 115895 KB 98%
> Total free: 3779 KB 3%
> Memory accounted for:
> Total accounted: 94949 KB
> File descriptor usage for squid:
> Maximum number of file descriptors: 4096
> Largest file desc currently in use: 442
> Number of file desc currently in use: 322
> Files queued for open: 0
> Available number of file descriptors: 3774
> Reserved number of file descriptors: 100
> Store Disk files open: 20
> Internal Data Structures:
> 374470 StoreEntries
> 8548 StoreEntries with MemObjects
> 8458 Hot Object Cache Items
> 374162 Filemap bits set
> 374145 on-disk objects
>
> --------- CUT --------
>
>
> Thanks for your time,
>
>
> --
> _______________________________________________________________________
> Magali BERNARD (Magali.Bernard@univ-st-etienne.fr)
> CRITeR - 23 rue du Dr Paul Michelon - 42023 St-Etienne Cedex 2 - FRANCE
> Tel: 04.77.48.50.62 Fax: 04.77.48.50.69
>
>
Received on Tue Mar 14 2000 - 04:16:16 MST