Symptoms

TMM may core due to memory leak, and the core file indicates a large memory allocation to wam::wam_bitset_bits

Impact

Reduced capacity and possible cores for low memory.

Conditions

This occurs when modifying the configuration. Each configuration change may leak a small amount of memory; scripts or other utilities which change the configuration frequently may encounter low memory situations. Whether the configuration will cause a leak is dependent on the configuration itself. This will be reflected in tmctl memory_usage_stat, with wam::wam_bitset_bits showing an abnormally high allocation. After a restart and configuration load, the current allocation should be zero; after running traffic the current allocation may be correct when non-zero.

Workaround

None.

Fix Information

This release fixes a memory leak related to a large memory allocation to wam::wam_bitset_bits, so the leak no longer occurs.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips