Squid Memory Problems

[Rahat Ali Khan <rahat.khan@xxxxxxxxxx>]

Hi there,

We are using Squid 3.5.14 on Ubuntu 14.04 LTS.  The squid is using 4 worker process and is used as an explicit and intercept proxy.

We have been facing a problem of squid processes consuming the memory gradually and eventually it comes to a minimum threshold. The end user browsing experience becomes extremely slow at that time. Cache memory configured is 2 GB and total memory of squid machines is 8 and 16 GB on different boxes. The memory consumption graphs shows a gradual decrease in available physical RAM  and we have to ultimately restart the squid boxed after 3-4 days.

The stats we get from cachemgr show:

Cache information for squid:
        Hits as % of all requests:      5min: 1.7%, 60min: 2.2%
        Hits as % of bytes sent:        5min: 0.2%, 60min: 0.1%
        Memory hits as % of hit requests:       5min: 91.7%, 60min: 82.8%
        Disk hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
        Storage Swap size:      0 KB
        Storage Swap capacity:   0.0% used,  0.0% free
        Storage Mem size:       2097056 KB
        Storage Mem capacity:   100.0% used,  0.0% free
        Mean Object Size:       0.00 KB

We are suspecting memory leaks to be the cause of this. Please share you experiences .

Thanks

Rahat

 

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