andrewbrg commented on issue #1686:
URL: 
https://github.com/apache/incubator-pagespeed-ngx/issues/1686#issuecomment-653889352


   It's a docker system with a mounted stateful drive for cache. There are
   multiple restarts (on every release) however the drive remains intact
   between deployments.
   
   I dunno, it's just info I am giving you guys in case it helps with other
   similar issues. I noticed that dropping the pagespeed cache folder
   completely and re-creating it fixed the issue. The re-written images were
   available immediately from the memcached server. I set the server to allow
   a max size of 3mb i think, nothing is really bigger than that.
   
   Thanks :)
   
   
   
   On Sun, 5 Jul 2020 at 12:15, Lofesa <notificati...@github.com> wrote:
   
   > Have you done a system restart?
   > Some systems when restarted re-create folders with determined user and
   > permisions, and may be these user/permision don´t permit write to the user
   > that runs the apache/nginx processes.
   > For example, in Centos distro you have the /etc/tempfiles.d/ directory
   > that may contain config files with lines like:
   > D /var/run/cache/nginx/ 0755 nginx nginx -
   > This line creates a directory (D) in this path with this permissions and
   > user/group owner.
   > This directory is created each restart if don´t exists.
   >
   > In other hand, memcached don´t store all pagespeed cache objects. Their
   > default config, stores only objects until 1Mb. This size is configurable
   > but allways fixed. If you configure it to store objects until 5Mb, these
   > that are biger need the file cache and if these file cache don´t exists or
   > is unwritable.....
   > Redis can store object of any size.
   >
   > —
   > You are receiving this because you were mentioned.
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