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Old 12-31-2001, 02:06 AM   #1
anoop_chandran
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Distribution: Redhat 7.0 ,mandrake 8.0 ,Redhat 7.2
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top question


hi,
this is the output of the "top" command :

12:23pm up 2:50, 4 users,load average:1.00,1.12, 1.07
80 processes: 78 sleeping,2 running,0 zombie,0 stopped
CPU states: 88.2 % user,11.5% system,0.0% nice,0.0% idle
Mem 249488k av,129660k used,119820k free,94380k shrd,17140k buff
Swap:530104k av, 0k used,530104k free 56440 cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
1111 root 16 0 9400 9400 4936 R 98.8 3.7 171:18 java
1622 root 1 0 1052 1052 816 R 0.7 0.4 0:04 top
1104 root 0 0 9400 9400 4936 S 0.7 3.7 1:18 java
1 root 0 0 532 532 468 S 0.0 0.2 0:06 init
......
..........
398 root 0 0 612 612 464 S 0.0 0.2 0:00 syslogd

i am running a java program in my system to monitor the mail.as the output of top shows the %CPU for java is 98.8,could someone tell me whether this is "harmfull" for any other process or not. i don't know anything abt the program,yes i know that the program generates many threads(one of the guys who wrote the pgm told me).. but i feel that there is something wrong in this CPU usage ...and also the PRI flag is set to 16...

how can i bring it under "control"...or is this quite normal...?

bye
Anoop
 
Old 12-31-2001, 04:59 AM   #2
DavidPhillips
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There are mail monitors out there that will not do that.

What is it monitoring?

It seems like something is very wrong with that picture.
 
Old 12-31-2001, 06:18 AM   #3
anoop_chandran
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well ,the pgm is supposed to monitor mail of every user in the server; mail directory -->> /var/spool/mail/user

and i was told the pgm also looks for pppx.pid ,b'oz there is a dialin setup running...if it finds any ppp0.pid the pgm looks for the logfile generated by ppp (specified in /etc/ppp/options ) and process it..
then update some database and something like that....aaaaahhh

this is the top command output a little while ago:

4:33pm up 7:00, 5 users, load average: 1.03, 1.01, 1.00
processes: 78 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: 90.0% user, 9.4% system, 0.0% nice, 0.4% idle
Mem: 249488K av, 139744K used, 109744K free, 94948K shrd, 22968K buff
Swap: 530104K av, 0K used, 530104K free 59108K cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
1111 root 16 0 9400 9400 4936 R 98.0 3.7 414:16 java
1926 root 1 0 1048 1048 816 R 1.9 0.4 0:00 top
1 root 0 0 532 532 468 S 0.0 0.2 0:06 init
2 root 0 0 0 0 0 SW 0.0 0.0 0:00 kflushd
3 root 0 0 0 0 0 SW 0.0 0.0 0:00 kupdate
4 root 0 0 0 0 0 SW 0.0 0.0 0:00 kpiod
5 root 0 0 0 0 0 SW 0.0 0.0 0:00 kswapd
6 root -20 -20 0 0 0 SW< 0.0 0.0 0:00 mdrecoveryd
398 root 0 0 612 612 512 S 0.0 0.2 0:01 syslogd
408 root 0 0 864 864 464 S 0.0 0.3 0:00 klogd
423 rpc 0 0 576 576 484 S 0.0 0.2 0:00 portmap
439 root 0 0 0 0 0 SW 0.0 0.0 0:00 lockd
440 root 0 0 0 0 0 SW 0.0 0.0 0:00 rpciod
450 rpcuser 0 0 768 768 656 S 0.0 0.3 0:00 rpc.statd
465 root 0 0 524 524 460 S 0.0 0.2 0:00 apmd
516 root 0 0 628 628 528 S 0.0 0.2 0:00 automount
569 nobody 0 0 720 720 608 S 0.0 0.2 0:00 identd

so that's it .........java still comes first.....could u tell me what could be missing in the pgm ,or what i should do to stabilize....

ps ax gives this........

1103 ? S 0.00 /usr/java/jdk1.3.1/bin/i386/native_thread/java AppServer
1104 ? S 2.50 /usr/java/jdk1.3.1/bin/i386/native_thread/java AppServer
1105 ? S 0.00 /usr/java/jdk1.3.1/bin/i386/native_thread/java AppServer
.
.
.
1110 ? S 0.00 /usr/java/jdk1.3.1/bin/i386/native_thread/java AppServer
1111 ? R 443.33 /usr/java/jdk1.3.1/bin/i386/native_thread/java AppServer


does that provide any idea?

bye n thanx
 
Old 12-31-2001, 12:51 PM   #4
DavidPhillips
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It just seems to be constantly going?

Does it slow the machine down?

I would consider if I really need it or not.

What is your CPU? maybe it is not suitable for the amount of system you have.
 
Old 12-31-2001, 01:41 PM   #5
DavidPhillips
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I just was checking my system while running java Pool.

The java_vm uses a lot of memory, and up to about 14% sometimes on my CPU.

Is your swap file in heavy use? That could add to the CPU use a lot.
 
Old 12-31-2001, 11:02 PM   #6
anoop_chandran
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HAPPY NEW YEAR

the system doesn't seem to be slow...


Distribution Version: Red Hat Linux release 7.0 (Guinness)

Operating System Version: #1 Tue Aug 22 16:49:06 EDT 2000
Operating System Release: 2.2.16-22
Processor Type: i686
pIII 933 MHz with 256 MB RAM ,
i have 512MB swap partition ,but as the top shows that 0k of swap is used...
i have squid running and seems to be slow,but does that have anything to do with java...maybe memory matters for squid...


even now i have 96.3 %CPU by java

output of free--->>
total used free shared buffers cached
Mem: 249488 209556 39932 105560 85952 51568
-/+ buffers/cache:72036 177452
Swap: 530104 0 530104


that's it ,swap is not being used....


suggestions....?

bye n thanx
 
  


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