Forum Discussion
Jayme_41167
Nimbostratus
NimbostratusF5 LTM increasing "TMM Used Memory"
Hi. I have a BIGIP run LTM 11.5.1 HF2 only. My TMM Used Memory increasing indefinitely.
I believe that the Subsystem xdata is responsible. What is the xdata?
I run the command:
tmsh show /sys memory | egrep 'Max\ Alloc|xdata'
SubSystem Alloc (bytes) Max Alloc (bytes) Object Size
xdata 1.1G 1.1G 2048
Thanks, Jayme
Jayme_41167Hi All, F5 released another hotfix (HF6) day 12/03/14. Apparently the problem was solved. Thank you all.
What_Lies_Bene1Cirrostratus
Great, thanks for the update.
Syed_Nazir_1624Cirrus
Xdata is used as a temporary buffer for storing TCP data that is not acked by either client or server. Either the client or the server is slow. Check the xdata after closing all the client and server side connection it should come down.
- Jayme_41167I saw on the dashboard that whenever there is a peak traffic, xdata size increases and consequently the memory used TMM also increases. This helps in anything? Thanks.
- Jayme_41167At dawn the connections go to 0 (only get the monitoring of connections Servers - icmp and http), but the xdata not decreases. Does memory leak? Thanks.
- What_Lies_Bene1Very interesting, thank you.
- What_Lies_Bene1
Hmmm, I think xdata may have something to do with one embedded subsystem or another. Sounds like you might be affected by a memory leak. I'd suggest you call F5 support to clarify.