>Have you set a pollerThreadCount? If so, what is it? If not, you might >want to consider setting it to "2", but probably not any higher, and >see if it improves things.
I have had a look and I cannot find where this is set. Is there any documentation on this? >When the CPU usage goes high, does the server actually slow down? I do not think so, it makes the server slowdown (and all the fans come on) Cheers Greg On 4 May 2015 at 15:13, Christopher Schultz <ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Greg, > > On 5/4/15 7:13 AM, Greg Huber wrote: > > Thanks, I am going to up the memory. The profiler I used only > > highlighted the ajp-apr-8009-Poller as active. Terminating the > > thread stopped the high cpu. > > ... and probably killed your ability to process requests, unless you > configured more than one Poller thread. > > Have you set a pollerThreadCount? If so, what is it? If not, you might > want to consider setting it to "2", but probably not any higher, and > see if it improves things. > > The Poller thread is responsible for handling all blocking-style I/O > both into and out of your servlets. When your site gets busy, this > thread will be doing a lot of work. > > When the CPU usage goes high, does the server actually slow down? > > - -chris > > > On 4 May 2015 at 10:18, Mark Thomas <ma...@apache.org> wrote: > > > >> On 03/05/2015 11:25, Greg Huber wrote: > >>> Hello, > >>> > >>> After an upgrade to Tomcat 8.0.21 and (Oracle jdk1.8.0_40) I > >>> seem to be having an erratic high cpu issue, often when the > >>> server gets busy. The application was OK tomcat 7 and has not > >>> been modified since the upgrade. > >> > >> Use ps to get the thread ID of the thread that is using the CPU. > >> Take a thread dump and find what that thread is doing (you'll > >> need to convert the thread ID from decimal to hex). It is the > >> stack trace of that thread that will be interesting. > >> > >> Mark > >> > >> > >> --------------------------------------------------------------------- > >> > >> > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > >> For additional commands, e-mail: users-h...@tomcat.apache.org > >> > >> > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2 > Comment: GPGTools - http://gpgtools.org > > iQIcBAEBCAAGBQJVR35yAAoJEBzwKT+lPKRYamAQAIYQMdBZLRueevXz71rqJxpA > Ij1lEpK4FlXrY1hukAKEX0k/yyiLc2UkXeI0DZtstKNiDDyEo+KmsykvjlTjUmAt > mvyhicQ3zhvlNaLIFYBwUIHNqzx+dBmgF/w75pkxKrDOj7MMx7gIFxPGXlTj2+XH > 1tt8uWgvHhElKnROjG+jU2bG3/wqZyXfSnT+SsfNhQQE6r0W3MRqJh/0X808GgWO > bSJdfk2Dz03/OksrEzK9cVV5/f4zB2Ggce/Uw+4qtZ0jj0jhRd9JXdaJlRFpPfbM > EdjDeOVmsJz6oqP+IvSEvtJjQY9RR6iJB8SkyWph64stxRQeeOBFzUsBIDWLTK+d > kB4/9HgGpnld8LaDEr3hrY2uXmtjEVwgkVzs1TKVpFipaACePuHG/3aa81/j0mMC > wP1iLSzt3SrjI2Z0dXlOszcB5DlQIiInqFG3PpTD8Wfr63hjX7m43zEdepamTX7d > eIjyu+TGX1Z+8yZabQzt+IPqGlk2uozafFiJOyxvwAbfBFqmF+rTKxOnYLMS67U7 > nFx50rXx/Xq1TCCsWbX4L1s0Y7Gh1G3DAtVTCLFKI+O3oW5aSUTed0trwUcE+oEP > VXYkRvSqDTcxJp+fXszz/yJGJxo3Yy46wfgX4WgGf9FZBdJ8XNchzOTPZp/qlqNa > WrehBe11KsKgy21Hc+Lz > =Hooe > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
