Look at this: Every 2.0s: lsof -i :3128 Mon Dec 19 16:38:22 2011 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME squid 20367 squid 12u IPv6 2474452 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4225 (ESTABLISHED) squid 20367 squid 18u IPv6 2473286 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4202 (ESTABLISHED) squid 20367 squid 22u IPv6 2474474 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4229 (ESTABLISHED) squid 20367 squid 24u IPv6 2473304 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4204 (ESTABLISHED) squid 20367 squid 28u IPv6 2473756 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4210 (ESTABLISHED) squid 20367 squid 34u IPv6 2474462 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4227 (ESTABLISHED) squid 20367 squid 38u IPv6 2474457 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4226 (ESTABLISHED) squid 20367 squid 42u IPv6 2474467 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4228 (ESTABLISHED) squid 20367 squid 44u IPv6 2474477 0t0 TCP trotsky.redecamara.camara.gov.br:squid->cainf-269642.redecamara.camara.gov.br:4230 (ESTABLISHED) squid 20367 squid 156u IPv6 2472223 0t0 TCP *:squid (LISTEN) Is only has IPV6 conection types. Is this a problem or point a possible bottleneck ? 2011/12/19 Wladner Klimach <wladner@xxxxxxxxx>: > Amos, > > how can I check if the keep alive is really working? Another thing, is > it normal behavior the cpu usage being hit 98% usage during one domain > download page? Could it be just hardware limitation? If so, this is a > very awkward situation because there's no severe load upon squid cause > only I using it. > > Regards, > > Wladner > > 2011/12/14 Amos Jeffries <squid3@xxxxxxxxxxxxx>: >> On Wed, 14 Dec 2011 13:22:38 -0200, Wladner Klimach wrote: >>> >>> Hello, >>> >>> i'm running squid with kerberos authentication. The problem is that >>> it's runing too slow. Looks like squid is negotiating with AD every >>> URL it tries to get. Anyone could point me a way out? >> >> >> A few things: >> >> * Double-check that you have connection persistence (keep-alive) operating >> on all connections (both client and server). >> >> * Ensure that your squid is as recent as you can use, we have had ongoing >> small fixes to improve persistence across all releases this past year. >> >> * Check that the auth packets are not failing over into NTLM or older >> protocols in apps which are supposed to be on Kerberos. >> >> * Maybe also check that DNS lookups Kerberos depends on for DC location are >> responding fast with reasonable TTL. >> >> Amos >>