Proper way to compute resident memory which uses ZGC

[Sundara Mohan M]

Thanks for the information.

On Tue, Feb 8, 2022 at 12:49 AM Per Liden <per.liden at oracle.com> wrote:

> Hi,
>
> On 2/8/22 01:12, Sundara Mohan M wrote:
> > Hi,
> >     I am seeing the top command is reporting ~3x the original memory heap
> > memory for a java process which uses ZGC. Know that this is because of
> the
> > colored pointer concept used in ZGC.
> >
> > What is the proper way to get the real resident size of this process?
>
> PSS (https://en.wikipedia.org/wiki/Proportional_set_size) gives a good
> view on actual memory used by a process.
>
>    cat /proc/<pid>/smaps_rollup | grep ^Pss:
>
> There are also a number of top-like tools (e.g. smem, psmem.py) that
> shows PSS.
>
> cheers,
> Per
>