-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 André,
On 6/26/14, 11:09 AM, André Warnier wrote: > Lars Engholm Johansen wrote: >> Thanks for all the replies guys. >> >> Have you observed a performance increase by setting >>> acceptorThreadCount to 4 instead of a lower number? I'm just >>> curious. >> >> >> No, but this was the consensus after elongated discussions in my >> team. We have 12 cpu cores - better save than sorry. I know that >> the official docs reads "although you would never really need >> more than 2" :-) >> >> The GC that Andre suggested was to get rid of some of CLOSE_WAIT >>> connections in netstat output, in case if those are owned by >>> some abandoned and non properly closed I/O classes that are >>> still present in JVM memory. >> >> >> Please check out the "open connections" graph at >> http://imgur.com/s4fOUte As far as I interpret, we only have a >> slight connection count growth during the days until the poller >> thread die. These may or may not disappear by forcing a GC, but >> the amount is not problematic until we hit the >> http-nio-80-ClientPoller-x thread death. > > Just to make sure : what kind of connections does this graph > actually show ? in which TCP state ? does it count only the > "established", or also the "FIN_WAIT", "CLOSE_WAIT", "LISTEN" etc.. > ? I think the state of the connections is a red herring: Tomcat will hold those connections forever because the poller thread has died. Nothing else matters. Even if the CLOSE_WAIT connections were somehow cleared, Tomcat would never respond properly to another request, ever. A Tomcat restart is required if the poller thread dies. One could argue that the poller threads should maybe "try harder" not to die, but sometimes you can't stop thread death. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJTrKZWAAoJEBzwKT+lPKRYZm8QAJ9fD8acAGZY/Tddt4TvUfat rjpEhyfhUkBIMZkPito/pKHsT8EuwP36g3spa8tmj94gSB+ajgqDjJ6jZ47AN/eG /0mSEMaedsaEXdO5e3RELDsDv16/fS0+OStvkG0/K22bWgf4Lbh7V9sC+LtIF04S szo++GV9ykgv9fmFVyxXKRwpDdNWxNzJvgGCi/gXo/1bpSYUTwRUQcXb0aANvU2i 90KAj4ng9SJqyGwLKvYencYH7Ga2vqmuePHNLKKtiNT6iRLz9ZI8O1qW+SzJIG+e moqS0VOz8C9v2yk1Dl7Ox7gw9A1dAd4GhLwtpsAcJFdpA4PKzto1hvKIuCLr3j7h 7pyw0/N2Nldl+nEOOhQiRU41e2L+wci0Rln2b83azvuqO2GrxUlJVthqjbTvLjMX TbFYAjpIUPZFlIMKtefXA+cPF7JUh1expXk5J6/l1u6hWHR8a/uQ8G5M/5DK+ObV 1n5f/xU9eoLjbGs7/RC87VhWsxW/WutPh68cPKeC2oH6Hk1VL0lkjUiQ3i4DC+ym yx4BvO1HUqY9uvjoGF0XoJRTcVlOyUP1G3zpxBBvL7ZpaU+r/c5MjjcMrgg6yzZe NhMYKGJJ+qIfAtZHCm3snPCFYPysz9JwuUIGPB6ZBOukzDUAi59YLM/u9CIexkiJ hZpHrNNu9zANMbFvt6jh =SJdz -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
