Hi Bryan, congratulation for recent nomination.
> On 19 Oct 2016, at 17:33, Bryan Call <[email protected]> wrote: > > Are the response times slow on the ATS server? I say not. ATS behaves fast as I can see (I’m switching from squid), although I’v not precise metrics. Time to time a new web page request hang at client side, when ATS is in the middle. > If so, you can turn on slow log and see where the requests are slowing down. see bottom lines > Can you give some details on the type of requests TLS/SSL vs non-encrypted From application stats on uplink ATS cache server does 40% SSL (443) and 35% (80). > or http/1.1 vs http/2? > Actually I’ve CONFIG proxy.config.http2.enabled INT 0 > Documentation on slow log: > https://docs.trafficserver.apache.org/en/latest/admin-guide/files/records.config.en.html?highlight=slow%20log#proxy-config-http-slow-log-threshold > > Example for slow log (times in seconds): > $ sudo /usr/local/bin/traffic_ctl config set > proxy.config.http.slow.log.threshold 1 This means 1 millisecond, is that a correct value to debug, or should I set some seconds ? > $ tail /usr/local/var/log/trafficserver/diags.log > [Oct 19 08:27:20.578] Server {0x2b7839272700} ERROR: [2] Slow Request: > client_ip: 127.0.0.1:44630 url: http://www.yahoo.com/ status: 301 unique id: > redirection_tries: 0 bytes: 304 fd: 0 client state: 0 server state: 9 > ua_begin: 0.000 ua_first_read: 0.000 ua_read_header_done: 0.000 > cache_open_read_begin: 0.000 cache_open_read_end: 0.000 dns_lookup_begin: > 0.000 dns_lookup_end: 0.000 server_connect: 0.000 server_first_read: 0.241 > server_read_header_done: 0.241 server_close: 0.241 ua_close: 0.241 sm_finish: > 0.241 plugin_active: -0.001 plugin_total: -0.001 > > Regards, Paolo. > -Bryan > > > > > >> On Oct 19, 2016, at 4:46 AM, Paolo Barbato <[email protected]> wrote: >> >> I’m using ATS as forward proxy, with a cache of 50 GB on disk, and 100/150 >> clients. In front there’s a CheckPoint firewall. >> >> ATS is installed on a CentOS 7.2 with 9 GB ram hosted on a VMWare farm. >> >> It works mostly fine, but time to time users (and me) observe hang when >> loading pages, not specific urls. >> >> CPU load is really low as well as memory usage (no swap at all). >> >> Monitoring cache port 8080, I see more or less 600/800 established >> connection per seconds during peak hours, with growing closed one that top >> at 500 at end of the day . >> >> >> If clients bypass ATS no issues are observed. >> >> Any hints on possible reasons? >> >> Regards, >> paolo >> >> ------------------------------------------------------------------------------------------------ >> Paolo Barbato >> >> Consorzio RFX >> corso Stati Uniti,4 >> 35127 Padova - Italy >> Network Administrator >> phone: +39 049 8295097 fax: +39 049 8700718 >> ------------------------------------------------------------------------------------------------ >> > ------------------------------------------------------------------------------------------------ Paolo Barbato Consorzio RFX corso Stati Uniti,4 35127 Padova - Italy Network Administrator phone: +39 049 8295097 fax: +39 049 8700718 ------------------------------------------------------------------------------------------------
