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dsmc processes swapping

#1
We currently have three TSM servers all running on CentOS 7. One of the servers dsmc processes will continually swap, eventually the server will die and need to be restarted. The server version is 8.1.1, clients are 8.1.0.

The other two servers haven't had this problem.

Here's smem -t -p

PID User Command Swap USS PSS RSS
124808 root /opt/tivoli/tsm/client/ba/b 22.72% 4.01% 4.01% 4.01%
203481 tsm0 db2sysc 0 0.00% 4.82% 4.83% 4.87%
3947 root /opt/tivoli/tsm/client/ba/b 56.88% 5.48% 5.48% 5.48%
79220 root ./dsmc sched 13.40% 10.29% 10.29% 10.30%
-------------------------------------------------------------------------------
65 11 93.72% 25.36% 25.70% 26.64%

The dsmc processes from the above look like:

root 3947 1 5 Oct17 ? 01:36:31 /opt/tivoli/tsm/client/ba/bin/dsmc sched
root 79220 1 4 Oct17 ? 00:56:46 ./dsmc sched
root 124808 124799 13 01:00 ? 01:46:23 /opt/tivoli/tsm/client/ba/bin/dsmc incremental /panfs/roc/msisoft -su=yes

Any ideas would be greatly appreciated.
 

Trident

TSM noob with 10 years expirience
ADSM.ORG Moderator
#2
Hi,
Try using dsmcad instead. It has a lower memory footprint, and will start/stop dsmc schedule as needed
 

marclant

ADSM.ORG Moderator
#3
Hi,
Try using dsmcad instead. It has a lower memory footprint, and will start/stop dsmc schedule as needed
It doesn't have a lower footprint, it just starts a fresh instance of dsmc as needed, so memory is released between backups. It doesn't lower the memory requirements during the backup.

We currently have three TSM servers all running on CentOS 7. One of the servers dsmc processes will continually swap, eventually the server will die and need to be restarted. The server version is 8.1.1, clients are 8.1.0.
Does it happen when idle or just during backups?
If it does when idle, then use CAD as Trident recommended

If it's only during the backup, does this backup have to inspect millions of files? If yes, then you may want to consider the MEMORYEFFICIENTBACKUP client option: https://www.ibm.com/support/knowled.../perf/r_opt_client_memoryefficientbackup.html

Also, you have old patch levels. I'd upgrade to the 8.1.8 client and 8.1.8 server levels (or server 8.1.1.400 if you don't want to deal with new security features yet).
 

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

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