kernel parameter usage

[yap]

Hi,
Is there a way to check current usage of a certain kernel parameter, say for example how to we check how many percents of shmem that has been used ?

regards,
tenghin

[Emiel van Grinsven]

If I'm not mistaken it depends on the version of your OS.

on 11.00 kmtune can give you some info.
Not sure if this goes for shmem

[Cheryl Griffin]

ipcs -mob allows you to check on shared memory processes.

[Alzhy]

ipcs -a will show you usage of all SysV SHM, SEM, MSG etc...

For kernel tables, "glance -t" if you have them will show a couple.

[yap]

Hi Emiel,
kmtune only show what is the value set for the parameter, right ? Does it shows the usage?

Hi Cherly, Nelson,

Can any one of you help me explains the output of "ipcs -a" and "ipcs -mob"? Not sure how does the output links to which kernel parameters?

Thank you all for replying my question!

regards
tenghinh

[Geoff Wild]

Here's a cool c program that outputs the following:

# memdetail
Memory Stat total used avail %used
physical 10080.0 8643.7 1436.3 86%
active virtual 9984.1 4385.2 5598.9 44%
active real 6302.8 2832.8 3470.0 45%
memory swap 7697.2 1922.2 5774.9 25%
device swap 26528.0 9696.8 16831.2 37%

Rgds...Geoff

[yap]

Hi Geoff,
Thanks for the scripts. Actually what I want is to checking the usage for kernel parameters, so that I can monitor it using scripts, before system give error such as number of open file exceeded so on and so fourth. Seems like glance is the answer so far, but I am not sure how to export the data to a file. Any idea ?

regards,
tenghin

[Ermin Borovac · Accepted solution]

Here's one way to do it.

$ cat syntax
print "file lock util", tbl_file_lock_util
print "file table util", tbl_file_table_util
print "msg table util", tbl_msg_table_util
print "proc table util", tbl_proc_table_util
print "sem table util", tbl_sem_table_util
print "shmem table util", tbl_shmem_table_util

$ glance -iterations 2 -adviser_only -syntax syntax > file

Please note that number of iterations has to be at least 2, so you will get two numbers for each metric. For description of metrics please see /opt/perf/paperdocs/mwa/C/methp.txt.

[Mic V.]

Glance is what I use. You can install a trial version of Glance from HP's "application" CDs, or at least you could last I looked. I searched software.hp.com but didn't see a download for free/trial version.

[yap]

Hi Ermin,
Thanks a lot. It works !.

Hi Vening,
Thanks for the advice.


regards,
tenghin

[Saurav_1]

Hi,

There is a software called kcweb. which uses EMS. it works on 11.11 & above. go to the link given below

http://www.software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=Casey

Saurav

[Hemanth Gurunath Basrur]

Hello Tenghin,

kcweb is available on 11.11 and onwards. The command "kcusage" can monitor and send alarm from following tunables:
dbc_max_pct 33 / 50
maxdsiz 67710976 / 1073741824
maxdsiz_64bit 8409088 / 4294967296
maxfiles_lim 84 / 4096
maxssiz 167936 / 8388608
maxssiz_64bit 45056 / 268435456
maxtsiz 3096576 / 100663296
maxtsiz_64bit 663552 / 1073741824
maxuprc 8 / 256
max_thread_proc 172 / 3000
msgmni 2 / 512
msgseg 0 / 8192
msgtql 0 / 1024
nfile 1277 / 65536
nflocks 21 / 4096
ninode 1049 / 4880
nkthread 600 / 8416
nproc 171 / 4200
npty 3 / 60
nstrpty 0 / 60
nstrtel 1 / 60
semmni 26 / 2048
semmns 76 / 4096
shmmax 17904720 / 1073741824
shmmni 9 / 400

Hope this helps.

Regards,
Hemanth