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08-17-2011 08:16 PM
08-17-2011 08:16 PM
Dear All,
We have a superdome and we are running billing application for a telco company, we notice the server is running slow during billing process are running. Some suspect there is flaw in kernel parameters something like filecache parameter. Please advice us how to fine tune the system. Thanks.
lonsum01:/ # uname -a
HP-UX lonsum01 B.11.31 U ia64 0779768182 unlimited-user license
lonsum01:/ # machinfo
CPU info:
8 Intel(R) Itanium 2 9100 series processors (1.6 GHz, 18 MB)
533 MT/s bus, CPU version A1
12 logical processors
Memory: 32635 MB (31.87 GB)
Firmware info:
Firmware revision: 9.48
FP SWA driver revision: 1.18
IPMI is supported on this system.
BMC firmware revision: 26.03
Platform info:
Model: "ia64 hp superdome server SD32B"
Machine ID number: 2e7a5176-9eaa-11de-bede-93f4816f1c99
Machine serial number: SGH4931071
OS info:
Nodename: lonsum01
Release: HP-UX B.11.31
Version: U (unlimited-user license)
Machine: ia64
ID Number: 0779768182
vmunix _release_version:
@(#) $Revision: vmunix: B.11.31_LR FLAVOR=perf
Solved! Go to Solution.
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08-17-2011 11:46 PM
08-17-2011 11:46 PM
Re: IA64 HP superdome server SD32B slow performance
What does "swapinfo -tam" show?
What do you have for filecache_max(5) & filecache_min(5)?
Do you have glance/gpm installed? Any networking or I/O bottlenecks?
Is your application multithreaded?
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08-18-2011 12:33 AM
08-18-2011 12:33 AM
Re: IA64 HP superdome server SD32B slow performance
Hi Dennis,
Thanks for the respond, at this moment there is not much process are running, so the CPU and Memory Usage is below threshold. Anyway i'll give the output of the follwoing command. Hope it helps
Glance is installed.
Not sure how to to get the output of filecache_min ? please give the commands.
Yes, there is I/O bottleneck for disk, saw that with "sar -d 1 5" command.
When i checked "kcusage -h maxfiles_lim", its 100% used, does this contribute some problem ?
lonsum01:/ # swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 32768 0 32768 0% 0 - 1 /dev/vg00/lvol2
reserve - 20843 -20843
memory 31042 19798 11244 64%
total 63810 40641 23169 64% - 0 -
lonsum01:/ # kcusage
Tunable Usage / Setting
=============================================
filecache_max 2203631616 / 3254961356
maxdsiz 532037632 / 1073741824
maxdsiz_64bit 147259392 / 4294967296
maxfiles_lim 4096 / 4096
maxssiz 196608 / 134217728
maxssiz_64bit 786432 / 268435456
maxtsiz 35868672 / 100663296
maxtsiz_64bit 218103808 / 1073741824
maxuprc 415 / 3780
max_thread_proc 448 / 1200
msgmni 2 / 4200
msgtql 0 / 4200
nflocks 25 / 4200
ninode 1922 / 95648
nkthread 2939 / 14716
nproc 908 / 4200
npty 0 / 60
nstrpty 4 / 60
nstrtel 0 / 60
nswapdev 1 / 32
nswapfs 0 / 32
semmni 32 / 4200
semmns 4696 / 8400
shmmax 4615913472 / 16106127360
shmmni 14 / 512
shmseg 3 / 300
lonsum01:/ # kcusage -h maxfiles_lim
Tunable: maxfiles_lim
Setting: 4096
Time Usage %
=============================================
Thu 08/18/11 14:30 MAL 4096 100.0
Thu 08/18/11 14:35 MAL 4096 100.0
Thu 08/18/11 14:40 MAL 4096 100.0
Thu 08/18/11 14:45 MAL 4096 100.0
Thu 08/18/11 14:50 MAL 4096 100.0
Thu 08/18/11 14:55 MAL 4096 100.0
Thu 08/18/11 15:00 MAL 4096 100.0
Thu 08/18/11 15:05 MAL 4096 100.0
Thu 08/18/11 15:10 MAL 4096 100.0
Thu 08/18/11 15:15 MAL 4096 100.0
Thu 08/18/11 15:20 MAL 4096 100.0
Thu 08/18/11 15:25 MAL 4096 100.0
- Tags:
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08-18-2011 12:43 AM
08-18-2011 12:43 AM
Re: IA64 HP superdome server SD32B slow performance
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08-18-2011 12:57 AM
08-18-2011 12:57 AM
Re: IA64 HP superdome server SD32B slow performance
>Glance is installed.
Try running it when your system slows down.
>Not sure how to to get the output of filecache_min?
kctune filecache_max filecache_min
>When I checked "kcusage -h maxfiles_lim", its 100% used, does this contribute some problem?
It might if some program is hitting that limit and spinning trying to handle that error? Why not increase it?
memory 31042 19798 11244 64%
total 63810 40641 23169 64%
No problems now.
lonsum01:/ # kcusage
Tunable Usage / Setting
filecache_max 2203631616 / 3254961356
maxfiles_lim 4096 / 4096
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08-18-2011 01:10 AM
08-18-2011 01:10 AM
Re: IA64 HP superdome server SD32B slow performance
Below is the output of the parameter :
lonsum01:/ # kctune filecache_max
Tunable Value Expression Changes
filecache_max 3254961356 10% Imm (auto disabled)
lonsum01:/ # kctune filecache_min
Tunable Value Expression Changes
filecache_min 1627480678 5% Imm (auto disabled)
How to check the above parameters whether its enough or otherwise ?
Any system impact in increasing filecache_max ? how much do you suggest ?
Any way to find those processes thats consuming high CPU,Memory and Disk I/O in the system ?
Cheers :)
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08-18-2011 02:09 AM
08-18-2011 02:09 AM
Solution>Below is the output of the parameter :
filecache_max 3254961356 10%
filecache_min 1627480678 5%
>How to check the above parameters whether its enough or otherwise?
They don't see to be too too large.
>Any system impact in increasing filecache_max?
We don't know if that's a problem yet.
>Any way to find those processes that's consuming high CPU, Memory and Disk I/O in the system?
That's what gpm does best. Run it when it slows down.
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08-18-2011 02:55 AM
08-18-2011 02:55 AM
Re: IA64 HP superdome server SD32B slow performance
We will try increase the filecache_max, filecache and maxfiles_lim parameter and monitor the system performance for now. Thanks for your advice.
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08-18-2011 03:00 AM
08-18-2011 03:00 AM
Re: IA64 HP superdome server SD32B slow performance
>We will try increase the filecache_max, filecache
Careful, these may do the wrong thing and I would suggest you get data from glance before you do these two.
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08-18-2011 05:22 AM
08-18-2011 05:22 AM
Re: IA64 HP superdome server SD32B slow performance
I would suggest you start up Glance before you experience problems. It could be difficult to start it up when your system is already under stress.
Pete