Forum Discussion
NimbostratusLTM/GTM logging
I was curious to see if adding more verbose logging will show more info in regards to the ltm/gtm devices that might be having issues. Is enhancing the verbosity of the /var/log/ltm, /var/log/gtm logs suggested at all ? what sort of impacted can this cause i.e system performance, disk space issues if any by increasing the verbosity ?
Thanks
4 Replies
Cory_50405Noctilucent
Depends on the issue. What kinds of problems are you having?
bigipjr28_13978Just in general I guess. Is there away to get more info from that logs then what is generally shown ?- Cory_50405You can increase logging levels for various different things. Navigate to System -> Logs -> Configuration -> Options to see what LTM and GTM functions are currently logging and at what levels. Then you can modify them accordingly. It can also be done through tmsh: http://support.f5.com/kb/en-us/solutions/public/13000/300/sol13317.html
- Kevin_Stewart
Employee
Syslog is generally configured to roll logs over after a point, so disk space shouldn't be an issue. The one thing you should consider though is that standard logging runs in a syslog service in the management plane, so passing doing a lot of logging from the data plane into the management plane can create performance issues. If you're going to be doing a lot of logging, use the HSL (high speed logging) process, which uses tmm to send remote syslog messages quickly. Now, as far as usefulness, that as Cory says, depends on what you're looking for. There are more than just LTM and GTM logs on any given platform, and a wealth of information that is either built-in or that can be configured.
