[squid-users] Memory leak in 3.2.5

I just upgraded from 2.7STABLE9 to 3.2.5, and now I'm battling a memory leak. Squid Cache: Version 3.2.5 configure options: '--prefix=/local/proxy/squid' '--with-maxfd=8192' '--with-pthreads' '--enable-storeio=aufs' '--enable-removal-policies=heap' '--enable-cache-digests' '--enable-delay-pools' '--enable-wccpv2' '--disable-external-acl-helpers' '--disable-ipv6' --enable-ltdl-convenience Here's the significant part of the configuration: ident_lookup_access permit all http_port 8000 cache_peer 127.0.0.1 parent 8080 0 no-query no-digest round-robin weight=1000000 #cache_peer p01.sas.com parent 8080 0 name=p1 no-query no-digest round-robin cache_peer p02.sas.com parent 8080 0 name=p2 no-query no-digest round-robin cache_peer p03.sas.com parent 8080 0 name=p3 no-query no-digest round-robin cache_peer p04.sas.com parent 8080 0 name=p4 no-query no-digest round-robin #cache_peer p01.sas.com sibling 8000 3130 name=s1 proxy-only cache_peer p02.sas.com sibling 8000 3130 name=s2 proxy-only cache_peer p03.sas.com sibling 8000 3130 name=s3 proxy-only cache_peer p04.sas.com sibling 8000 3130 name=s4 proxy-only memory_replacement_policy heap GDSF cache_replacement_policy heap LFUDA cache_dir aufs /cache/squid/aufs 100000 64 253 maximum_object_size 5000000 KB I have four squid servers identically configured, each a sibling to the other. Each has a local parent proxy (virus scanner). If the local virus scanner is unresponsive, the request is forwarded to one of the other three in round-robin fashion. I am also performing ident queries just for logging purposes. Requests do not require authentication. This configuration has worked without issue for several years with squid 2.7STABLE9. It doesn't work well with squid 3.2.5. Memory usage grows at about the same rate as the query rate. After 16 hours memory usage is about 6 GB. The query rate is about 200/sec during business hours. If I restart squid the memory usage goes back to ~600 MB and starts growing. There are about 2.5 million objects in the cache. I thought the problem might be ICP, so I tried HTCP instead of ICP for the cache siblings but that did not make a difference. I do have another 3.2.5 system handling ~100 requests/second that does not exhibit the problem. The one without a problem uses these four as siblings, and I've tried both ICP and HTCP there, too. I've checked the cache.log file for clues. After ~5,000,000 queries I found ~1,500 messages like WARNING: Forwarding loop detected for and ~3,000 messages like Failed to select source for '[null_entry]' Those messages would have to leak about 1 MB each to account for the memory loss I'm seeing. The system without the problem does not perform the ident queries. Could the leak be there? Is anyone using ident? Mike Mitchell
Received on Thu Dec 20 2012 - 21:47:09 MST