Memory usage

[Roberto O. Fernández Crisial]

Kristian,

Thank you for your reply. I was looking for a command that shows me the
memory usage (userd and free) to monitors servers from Nagios/Cacti
software. Do you know where can I start? Do you know anoutabout any test
script to find out how many memory is being used?

Thank you,
Roberto.


2011/1/3 Kristian Lyngstol <kristian at varnish-software.com>

> Hi,
>
> On Thu, Dec 30, 2010 at 12:47:36PM -0300, Roberto O. Fernández Crisial
> wrote:
> > I have two servers running varnish (varnish-2.1.3 SVN), and both started
> > with "-s malloc,28G" option.
> >
> > I've tried with varnishstat, looking for sma's values (I think
> "sma_balloc +
> > sma_bfree = 28G"), but only in one server shows "correct" information:
> >
> > sma_balloc       1641487715428          .   SMA bytes allocated
> > sma_bfree        1611596371850          .   SMA bytes free
> >
> > The other server shows:
> >
> > sma_balloc       239065444117          .   SMA bytes allocated
> > sma_bfree        226776048576          .   SMA bytes free
> >
> > What should I do to see the memory used and memory free from varnish
> cache?
>
> sma_nbytes is probably easier to read - though you'll get the same result.
>
> This only indicates that the second server hasn't filled the cache. To
> verify this, check if the first server has n_lru_nuked objects (it should)
> and compare it to the second server (which should have 0 nuked - unless the
> cache size shrunk dramatically).
>
> The sma_nbytes and related counters refer to memory used for current
> objects, not what is available. To allocate space for a new object, Varnish
> checks that:
>
>  (new object size) + (sma_nbytes) < (total size, specified by -s)
>
> Hope this helps.
>
> - Kristian
>
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