[sr-dev] [kamailio/kamailio] pv_cache gets filled if dynamic names are used (Issue #3440)

### Description _**Sipwise** hat on_ We noticed that pkg memory was getting exhausted and we found out that pv_cache_add() was the origin of the allocations. We are using ``$xavp(user_<UUID>)`` variables that, for sure, are kind of dynamic. There is a pv_cache_drop() that tries to remove ``$sht()`` occurrences when the cache is about to be filled but in our case that's not helping. #### Log Messages ``` WARNING: ROUTE_SET_CALLEE_DIALOG_TOTAL <core> [core/pvapi.c:340]: pv_cache_add(): pv cache limit is going to be exceeded - pkg memory may get filled with pv declarations WARNING: dialog:failed <core> [core/pvapi.c:340]: pv_cache_add(): pv cache limit is going to be exceeded - pkg memory may get filled with pv declarations ``` ### Possible Solutions Possible solutions that came on the top of my head: - add a datetime member to struct _pv_cache so we can keep the last time it was accessed and search for the oldest and remove them in pv_cache_drop() - add pv module parameter to define a magic prefix, for instance '__' that will mark those vars as "temporal" should remove it from cache when needed. - add pv module parameter to control what types of variables will be added to cache Any thoughts about this? -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3440 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3440(a)github.com&gt;