Score:1

What does buffered, cached, free, slab and used mean when monitoring memory use on GKE?

dz flag

I am running some compute nodes on GKE and when I look on their memory usage in metrics explorer I see:

enter image description here

It is clear to me what used and free mean. But how about the other states?

The official documentation is quite terse on the subject.

Michael Hampton avatar
cz flag
https://linuxatemyram.com/
Score:2
in flag

That is standard terminology of Linux Kernel management:

buffered - Block device (e.g. harddisk) cache

cached - Parked file data (file content) cache

slab - Memory used by the kernel to cache data structures for its own use (caches like inode, dentry, etc)

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