Bug ID 562044: Statistics slow_merge option does not work

Last Modified: Oct 16, 2023

Affected Product(s):
BIG-IP All(all modules)

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.1.0, 12.0.0 HF3, 11.6.1 HF1, 11.5.4 HF2

Opened: Dec 08, 2015

Severity: 3-Major

Related Article: K80886243


When the statistics DB variable option 'merged.method' is set to 'slow_merge' then the merging of statistics stops working. This causes statistics to no longer appear to be updated.


Statistics no longer appear to be updated.


The DB variable 'merged.method' is set to 'slow_merge'.


1) Set "merged.method" to "fast_merge" which is the default. -or- 2) Create the /var/tmstat/cluster directory using mkdir. Please note the directory must be created on every blade in a chassis. Additionally, this directory needs to be re-created after reboots, so something like "/bin/mkdir /var/tmstat/cluster" should be added to "/config/startup"

Fix Information

Statistics are now updated as expected when the statistics DB variable option 'merged.method' is set to 'slow_merge'.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips