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Former Member
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Message 1 of 4

ESM High memory usage

Hi we have an ESM running with a CPU load of 6% and several hundreds of events per second, but the memory usage is 90% of the available 64GB. Why is that so high?
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McAfee Employee
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Re: ESM High memory usage

Hello there,

Memory usage in ESM depends on the queries running, EPS,reports/watchlists running at that time. 

May I know about your ESM for detailed understanding ? Is that a Combo box along with receiver and ELM or a standalone ESM ? Also specify the model number of it. 


McAfee Employee
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Re: ESM High memory usage

In order to most effectively use the resources available to it, the ESM will use the majority of available RAM as disk cache - this improves performance and if the RAM is needed for another purpose, the disk cache can be discarded.

To verify if this is the case, please run the command:

free -m

on the back-end of your ESM appliance.  The output will be similar to this:

  total used free shared buffers cached
Mem: 64253 54073 10179 0 532 28832
-/+ buffers/cache:   24708 39544      
Swap: 4901 0 4901      


The real free RAM value is the second one under free against the -/+ buffers/cache entry.

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Re: ESM High memory usage

after i am running the free -m what is the next step to free the ram cache? 

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