topic Re: proc full in Operating System - HP-UX

proc full

madhudeepan — Wed, 02 Sep 2009 07:55:31 GMT

when i checked dmesg and syslog ,, it shows proc was full

i used this command

sar -v 2 20

output for this
23:49:16 text-sz ov proc-sz ov inod-sz ov file-sz ov
23:49:18 N/A N/A 971/4200 0 12015/35648 0 14526/2147483647 0
23:49:20 N/A N/A 971/4200 0 12015/35648 0 14526/2147483647 0
23:49:22 N/A N/A 971/4200 0 12017/35648 0 14529/2147483647 0
23:49:24 N/A N/A 972/4200 0 12028/35648 0 14544/2147483647 0
23:49:26 N/A N/A 972/4200 0 12028/35648 0 14544/2147483647 0
23:49:28 N/A N/A 972/4200 0 12030/35648 0 14546/2147483647 0
23:49:30 N/A N/A 972/4200 0 12031/35648 0 14547/2147483647 0
23:49:32 N/A N/A 973/4200 0 12025/35648 0 14541/2147483647 0
23:49:34 N/A N/A 972/4200 0 12033/35648 0 14548/2147483647 0
23:49:36 N/A N/A 974/4200 0 12037/35648 0 14556/2147483647 0
23:49:38 N/A N/A 975/4200 0 12031/35648 0 14546/2147483647 0
23:49:40 N/A N/A 968/4200 0 12024/35648 0 14531/2147483647 0
23:49:42 N/A N/A 968/4200 0 12023/35648 0 14527/2147483647 0
23:49:44 N/A N/A 971/4200 0 12033/35648 0 14542/2147483647 0
23:49:46 N/A N/A 971/4200 0 12034/35648 0 14540/2147483647 0
23:49:48 N/A N/A 971/4200 0 12036/35648 0 14542/2147483647 0
23:49:50 N/A N/A 971/4200 0 12037/35648 0 14545/2147483647 0
23:49:52 N/A N/A 971/4200 0 12043/35648 0 14553/2147483647 0
23:49:54 N/A N/A 971/4200 0 12043/35648 0 14551/2147483647 0
23:49:56 N/A N/A 968/4200 0 12041/35648 0 14549/2147483647 0

what i have to do now to increase the value

Re: proc full

Turgay Cavdar — Wed, 02 Sep 2009 08:04:05 GMT

increase the proc size:
kctune nproc=value_you_need

Re: proc full

madhudeepan — Wed, 02 Sep 2009 08:06:12 GMT

we have planed to increase shmmax value,,

by increasing shmax value will system gets reboot or not ..

if i changed the value is it possiable to take copy of the old kernel parameters

Re: proc full

madhudeepan — Wed, 02 Sep 2009 08:07:22 GMT

ho turgay

if i increase will machine gets rebooted ..

Re: proc full

Turgay Cavdar — Wed, 02 Sep 2009 08:12:45 GMT

shmmax is dynamic parameter you dont need to reboot your system. For help type man shmmax.To save your config type:
kconfig -s config_name

Re: proc full

Fabio Ettore — Wed, 02 Sep 2009 08:14:27 GMT

Hi,

I cannot see proc: table is full as you have 970 processes on 4200 which is the value of kernel parameter nproc. Maybe you see messages in syslog.log because in the past nproc limit was reached.

Also about shmmax the tunable can be changed immediately without reboot.

Best regards,
Fabio

Re: proc full

madhudeepan — Wed, 02 Sep 2009 08:23:06 GMT

hi Fabio

right now i checked with sar command

proc-sz value is 1114/4200

at what condition do proc will get full

what is the max and min value

Re: proc full

Fabio Ettore — Wed, 02 Sep 2009 08:28:51 GMT

Hi Fabio,

in the showed condition (1114/4200) proc table IS NOT full.
You should get the message "proc: table is full" when the value of the first column will be equal or almost to the value on the second column.

To get constraints about min and max of nproc read the following:

# kctune -vq nproc
Tunable nproc
Description Maximum number of processes on the system
Module pm
.........
Constraints nproc >= 100
nproc <= 30000
nproc >= maxuprc + 5
nproc <= nkthread - 100
nproc >= semmnu + 4
Can Change Immediately or at Next Boot

HTH.

Best regards,
Fabio

Re: proc full

madhudeepan — Wed, 02 Sep 2009 08:36:26 GMT

yes ,, i accept your point 1114/4400 not as full ,,, but then why i get a message in dmesg and syslog ,,

id not so what can i do with the logs in syslg and dmesg

Re: proc full

Fabio Ettore — Wed, 02 Sep 2009 08:42:40 GMT

Hi,

consider that dmesg retains even old messages in its buffer, instead I don't understand what about syslog.log.
Do you see the message of proc: table is full right now into the syslog.log?

Could you please attach it here?

Fabio

Re: proc full

madhudeepan — Wed, 02 Sep 2009 08:55:41 GMT

right now i dont get message in syslog ,,, getting msg only in dmesg

Re: proc full

Fabio Ettore — Wed, 02 Sep 2009 09:02:37 GMT

Ok, so now the system is working well and the setting of nproc is sufficient to satisfy the load.
Though I'd suggest monitoring the situation by sar to check if the nproc limit is going to be reached again. If so I should check if the load of system has increased lately, in that case change the value of nproc to accomodate the load. Consider that in HP-UX 11.23 nproc can be modified immediately without reboot.

Best regards,
Fabio

Re: proc full

madhudeepan — Sat, 05 Sep 2009 16:57:18 GMT

we have decided to increase the shmmax value to 70% of the physical memeory

what are the prerequisites need be followed

how to increase shmmax value

Re: proc full

Patrick Wallek — Sun, 06 Sep 2009 01:13:19 GMT

>>we have decided to increase the shmmax value to 70% of the physical memeory

Why? The proc table full messages have nothing to do with shared memory as far as I know.