Forum Discussion
Unexpected TMOS utalsiation hit
I have a bigip 6400 platform running LTM v 9.4.7
We have an iRule to direct HTTP requests coming into the F5 from the datacentre out to the appropriate external service (For XML...
Yes, they did a test run with 2 servers running initially, the 2nd server ran into trouble so they stopped, and then ran with a single server for the remainder of the session. First spike was 12 HTTP requests a second, second prolonged period was 6 transactions per second. As you can see, normal operation (Its a webapp we're hosting, so most busy during the day, ~ 100 TPS), the TMOS utalsiation is minimal, despite there being more complex iRules running.
The three curl loops don't show the same elevation, but its hard to tell how many requests per second its pushing. I'll put together a counter on the while true; do curl; done loop and run that from the standby box to avoid contaminating.
What hardware / software version did you run a test and see 3% utal. Did you have a serverssl profile on?
Nothing in the LTM logs. The way i tracked it down to this particular flow is 1) asking around what we did differently overnight. 2) next time they repeated it running packet captures and looking at what vips went busy.
