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Vijay_1982_1648's avatar
Vijay_1982_1648
Icon for Nimbostratus rankNimbostratus
Apr 26, 2016

High memory utillzation on F5 Viprion 2400 model

Hi all,   we have 2 viprion box and from one viprion, we have participate 3 LTM. All of them showing memory utilization high ( like total physical memory 5.5G, OS used memory 5.4 G and TMM is 4.0 ...
application delivery
BIG-IP
LTM
Hannes_Rapp_162's avatar
Hannes_Rapp_162
Icon for Nacreous rankNacreous
Apr 27, 2016

Are you sure it's a problem? You're probably looking at memory allocation, not memory utilization.

Try the following:

[bigip-01:Changes Pending] ~  free -m
             total       used       free     shared    buffers     cached
Mem:         16077      16010         66          0        365       4079
-/+ buffers/cache:      11566       4510

From the command above, it looks as if nearly 100% memory is used but in reality only 11566 MB out of 16077 MB are allocated to buffers. That's about 72% true memory usage and not 100%

Hannes_Rapp_162's avatar
Hannes_Rapp_162
Icon for Nacreous rankNacreous
Apr 27, 2016
Can you add a new blade? That perhaps may be the easiest option. Your other options come down to configuration optimization (less memory allocation for caching, reduction of idle timeout values etc.). If you run your LTMs as vCMP guests, you may be able to just allocate more memory from the pool of physical memory that is available. For that, the Guest must be shut down, and new provisioning must be made on the Host system. This may help you get started: https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/vcmp_admin_11_0_0/7.html