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From "Martin, Brian" <BMar...@AlamoLocal.com>
Subject tomcat thread hogs CPU - is this a bug ?
Date Wed, 09 May 2001 13:46:06 GMT

I am running tomcat 3.2 on an dual cpu HPUX-11.0 box, 
using IIS on the front end on an NT box.

when I look at the thread list (using glance) for the tomcat process,
i can see 42 threads, but only one of them is showing high cpu usage
in this screen shot, it is thread id 8168.

why are there so many threads at 0 % ?  

is anyony else running tomcat on hpux ? if yes, can you email me your
screen captures showing performance related stuff. I am trying to figure
out whether or not some of the things that i am looking at are 'normal'
or just my system.

is there a way to tell what each thread is doing ?




Thread List PID:  2805, java            PPID:  2803 euid:   101 User:
weblogic
           CPU Util    CPU Tm      Phys          Logl
Block
 TID    (  200% max)    Cum       IO Rate      IO Rate   Scheduler  Pri   On
----------------------------------------------------------------------------
  8150    0.0/   0.0     1.8    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8167    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8168   46.8/   6.5  3950.7    0.0/   0.0    0.0/   0.0      HPUX  239
PRI  
  8169    0.0/   0.0     1.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8170    0.0/   0.0     1.5    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8171    0.2/   0.1    79.6    0.0/   0.0    0.0/   0.0      HPUX  168
SLEEP
  8172    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8173    0.7/   0.1    33.5    0.0/   0.0    8.1/   0.8      HPUX  154
SYSTM
  8174    0.0/   0.0     3.6    0.0/   0.0    0.0/   0.0      HPUX  168
SLEEP
  8175    0.0/   0.0    11.2    0.0/   0.0    0.0/  10.9      HPUX  154
SYSTM
  8176    0.0/   0.0     4.3    0.0/   0.0    0.0/   4.1      HPUX  154
SYSTM
  8177    4.8/   0.1    57.8    0.0/   0.0 3564.2/  56.9      HPUX  192
PRI
  8178    0.0/   0.2   108.1    0.0/   0.0    0.0/ 103.3      HPUX  154
SYSTM
  8179    0.0/   0.0    16.0    0.0/   0.0    0.0/  15.6      HPUX  154
SYSTM
  8180    7.6/   0.3   186.5    0.0/   0.0 5402.8/ 188.7      HPUX  192
PRI
  8181    4.0/   0.1    47.5    0.0/   0.0 2815.3/  49.6      HPUX  154
STRMS
  8182    0.0/   0.3   155.4    0.0/   0.0    0.0/ 159.6      HPUX  154
SYSTM
  8183    4.7/   0.3   164.6    0.0/   0.0 2677.0/ 169.5      HPUX  154
SYSTM
  8184    4.7/   0.3   207.6    0.0/   0.0 2556.4/ 209.6      HPUX  193
PRI
  8185    0.0/   0.0     0.2    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8190    0.0/   0.0     0.3    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8191    0.0/   0.0     3.9    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8192    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8193    0.0/   0.0     4.1    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8194    0.0/   0.0     0.2    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8195    0.2/   0.1    50.7    0.0/   0.0    0.0/   0.0      HPUX  154
SLEEP
  8196    0.0/   0.0     0.3    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8197    0.0/   0.0     4.6    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
 29571    0.0/   0.1     7.2    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8546    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8547    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8548    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8549    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8550    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8551    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8552    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM
  8553    0.0/   0.0     0.0    0.0/   0.0    0.0/   0.0      HPUX  154
SYSTM


Brian Martin
Unix Administrator
Alamo, Local Market Division
(440) 715-3549


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