Cristiano_Costa
May 17, 2018Nimbostratus
DOS Layer 7 memory consumption
Hello,
Recently we had a problem where BIGIP started killing several tcp connections. Analyzing the issue we discovered that the TMM "used memory" was over 85% and BIGIP began to kill the connections.
So, we started looking why TMM was using so much memory and found out that the "Memory Pool" with the name "DoS Layer 7 ACY" was using 2.7G (a much higher value than any other entry in the memory pool table).
Does this "DoS Layer 7 ACY" use TMM's allocated memory? If yes, is there a way to reduce this amount of memory?
ps:
- BIGIP VE 12.1.1 (LTM, ASM, AVR, AFM and AAM);
- We use "DOS Layer 7" feature in 15 Virtual Servers (mainly to block bots);
- We have 5.6G allocated to TMM.
Thank you,
Cristiano