shared dictionary - no memory error

sarav.sars · 2014-09-05T20:30:07+00:00

I have resolved this issue by using nginx map which includes mapping file.e.gmap $uri $redirect_to { default no...

shared dictionary - no memory error

sarav.sars

All nginx workers put some key,value (value is large string) pair in shared dictionary for every 30 seconds. For every 1 minute, timer thread will send the data from shared dictionary to redis and clear the shared dictionary (flush_all and flush_expired). It is working fine for few hours but after that only few workers data is available in shared dictionary due to "no memory" error and forcibly removing other worker entries.

After some time no workers can put the data due to no memory error and in timer thread the data is empty.

what would be the reason for this behavior ?

Thanks

agentzh

Hello!

On Fri, Sep 5, 2014 at 5:30 AM, Saravanan Elumalai wrote:
> After some time no workers can put the data due to no memory error and in
> timer thread the data is empty.
>
> what would be the reason for this behavior ?
>

Looks like a memory fragmentation issue. Which version of nginx are
you using? You need at least nginx 1.7.2 (the newer the better)
because a serious fragmentation bug in nginx's slab allocator was
first fixed in this version of nginx.

Regards,
-agentzh

sarav.sars

Hello

I'm using nginx 1.6.1. I will test the same in 1.7.4.
Thanks for the info.