information on performance

[pétot stéphane]

Hi everyone,
I work on a problem of performance on a superdome system with 11.11 v1.
I used the crashinfo commands (q4 script of HATOOLS).

This command seems to be really interested but it 's not supported and otherwise it's not documented. I'm a newbies in performance and i need your help on some vocabularies

i want to know what is TICKS

what kind of buffer io errors are sd_strategy_bioerrors. Is it dangerous formy system ?

what is TSZOMB ?? i think it's zombie thread

what is IOVA ?

if somebody have answer to my question please help me

Thanks a lot

[D Block 2]

try this one:

# kmtune

# dmesg

# sar -v 5 5

# swapinfo -tam


study your tunes, and run sam, go to kernel parameters, if you need to increase any of these items: nproc, nktreads.


TICK is your clock resolution for your process allocation in a time sharing OS.

if you search "sched" or scheduler in this Forums, you might find some helpful info.

ZOMB - or Zombie (another name: DEFUNCT) might not be a good thing if there are lot's of Zombies, you might run out of the Process-Table enries.

If you search "zombie" in http://docs.hp.com this might help.

might I suggest running "glance", see http://docs.hp.com for GLANCE.

Crashinfo tool is nice and Q4 is nice, but start with the "ps -ef" command or "ps -elf" command, and not the states of the processes, R(running), Z(zombie), S(sleeping), etc..

you might have a process stealing the CPU cycles... are you running an application that does "select(2)" calls ?

btw, there is a great book on performance on 11.11, check out Prentice Hall books or Amazon and look for : HPUX performance.

best of luck

[Bharat Katkar]

Hi,
Find attached, DOC on Performance Cookbook.
Hope that helps.
Regards,

[pétot stéphane]

thanks a lot for yout informations ( ticks info ) i have ever this cookbook. My tool for the perf are mwa/gpm/pv sar and q4.

My main answer was about the buffer io problem that i have with crashinfo 'cause for zombie problem i think it's due to patches ( 195 zombies ) and
particulary from an alarming apps

[Steven E. Protter]

Attaching some handy dandy perf data collection tools.

Its production and runs background.

Also:

http://www1.itrc.hp.com/service/cki/search.do?category=c0&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty&searchString=UPERFKBAN00000726&search.y=8&search.x=28&mode=id&admit=-682735245+1090854105372+28353475&searchCrit=allwords

SEP

[D Block 2]

might I suggest you run run a Kernel Trace using a tool called: TUSC (or truss). install the tool and monitor the parent process that turns into a Zombie. might help.