Hi Guillaume,
Thanks for your response and details.
Please find my comments inline:
On 07/02/18 6:21 pm, Guillaume Quintard wrote:
Hi there,
So, varnish memory usage will mostly come from three directions:
- storage, include Transient, so check the g_bytes fields in
varnishstat. Passes and shortlived objects will use Transient, so you
can either reduce those, or limit the Transient storage (unbounded by
defaukt).
Checked the g_bytes for transient in varnishstat. It's in Kbs.
- thread workspaces, one thread typically uses one workspace, so you
can limit the number of threads, or reduce the workspace size
- memory fragmentation: jemalloc will fragment up to 25%, not much you
can do here.
And no, no way to modify the mmap without restarting varnish.
May I ask how much data you are caching?
Could you please let me know how to figure out the amount of data cached?
--
Guillaume Quintard
On Wed, Feb 7, 2018 at 1:34 PM, Pinakee BIswas <[email protected]
<mailto:[email protected]>> wrote:
Hi,
We have been using varnish since more than a year for our
ecommerce site.
Current version is 4.1.8.
OS is Linux. RAM is 8GB.
I am observing that the varnish memory usage is increasing (right
now 7%) and so is resident memory usage increasing.
The storage being used is file:
-s file,/tmp/varnish/,${storage}
I am not sure about the reason for the increase in varnish memory
usage:
* Is there a way to limit the varnish memory usage?
* How can I diagnose what is consuming memory?
* Most of our web pages have maximum 2 days of cache. Also, some
of the pages might be least visited.
* Is there a way to manipulate varnish mmap (when file storage
is used)?
Would appreciate any help on the above for efficient use of varnish.
Thanks,
Pinakee
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