Greetings! I am poking a potential squid upgrade from squid 2 to 3.1.8 with a new config, but it's added around 40% more CPU load, and I'm looking for tune-ups.
One thing I notice it doing when I truss is read()ing HTTP responses with only a 2046 byte buffer, whereas squid2 used 24Kb. This is making for a lot of unnecessary system calls and go-arounds in the main polling loop. I went for a rummage in the code for the buffer size decisions, but got very very lost in the OO abstractions very quickly. Can anyone point me at anything I can tweak to fix this? Besides that, I have a laaarge url_regexp file to process, and I was wondering if there was any benefit to trying to break this regexp out to a perl helper process (and if anyone has a precooked setup doing this I can borrow) Beyond that, I assume, to get the most out of a multi-cpu system I should be running one squid per CPU, which means I need more IP's and that they can't share their memory or disk caches with each other directly, and I would need to switch on HTCP to try and re-merge them? While I'm musing here, is there any way to make an ACL construct that makes a decision based on whether something is already cached? I have a lot of heavy ACL's, and if something is cached, in my case, it will prove that it has previously passed all the ACL's and I can just return the cached copy. Build: Sun Solaris 9 PATH=~/sunstudio12.0/bin:$PATH ./configure CC=cc CXX=CC CFLAGS="-fast -xtarget=ultra3i -m64 -xipo" CXXFLAGS="-fast -xtarget=ultra3i -m64 -xipo" --enable-cache-digests --enable-removal-policies=lru,heap --enable-storeio=aufs,ufs --enable-devpoll Tuney bits of Config: htcp_port 0 icp_port 0 digest_generation off quick_abort_min 0 KB quick_abort_max 0 KB read_ahead_gap 64 KB store_avg_object_size 16 KB read_timeout 5 minutes request_timeout 30 seconds persistent_request_timeout 30 seconds pconn_timeout 3 seconds cache_mem 512 MB maximum_object_size_in_memory 64 KB memory_replacement_policy heap GDSF ignore_expect_100 on client_db off Grateful for any tips and pointers. DeclanW
