What does Dynatrace consider as reclaimable memory on the host?

[moses_chacko]

According to documentation

Memory used
Percentage of total RAM used by processes. RAM used by system caches and buffers isn't included in this metric. Dynatrace calculates memory usage as:
memory_used = total_memory_size - (free_memory + active_memory + inactive_memory + reclaimamble_memory)

What does dynatrace consider reclaimable memory?

We are having and instance where the cached memory is considered as memory used where as the actuall process memory is 20%.

Any ideas on correcting / setting changes

Thanks

Moses

[Julius_Loman · Accepted solution]

Have you seen this blog post ? It explains it pretty well.

[Mizső]

Hi Folks,

Have you seen such a memory pattern? Do you thnik it is a memory leak in a jvm?

I could not recognize any process which is responsible for this pattern.

Thanks in advance for your help.

Best regards,

Mizső

[AntonioSousa]

@Mizső,

The rise does not surprise me, as the OS will typically use available RAM to cache mainly disk access. What does surprise me are the sudden drops, as there seems to have been no restarts. We would probably need a little bit more context though to understand it, namely the OS 😉

[Mizső]

Hi @AntonioSousa,

It was linux RHEL 7.x, but since that it was upgraded to 8.x. Unfortunately the client dt system will not accessible anymore, so I will not be able the check the memory consumption of the host... 😞

Best regards,

Mizső