8 May
2019
8 May
'19
4:25 a.m.
### Description
We are experiencing sticky OOM state after an extended period (several days). `kamcmd`
inspection of mem use shows memory consumed (leaked) via `pv_cache_add(347)` calls.
Inspection of that function suggests nothing can ever be dropped from the cache --
rendering it leaky. `_pv_cache_counter` is tested twice but after initialization (to zero)
never appears to be assigned (incremented or otherwise) and so the conditions needed to
call `pv_cache_drop` are never met.
### Troubleshooting
#### Debugging Data
```
May 5 23:55:40 eng-X X[1107]: 1(105) INFO: qm_sums: count= 1 size= 2048 bytes
from core: core/counters.c: cnt_hash_add(383)
May 5 23:55:40 eng-X X[1107]: 1(105) INFO: qm_sums: count= 18473 size= 5571880 bytes
from core: core/pvapi.c: pv_cache_add(347)
May 5 23:55:40 eng-X X[1107]: 1(105) INFO: qm_sums: count= 162 size= 9344 bytes
from core: core/pvapi.c: pv_parse_format(1150)
```
### Additional Information
```
kamcmd> ver
kamailio 5.2.2 (x86_64/linux)
kamcmd>
```
* **Operating System**:
<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04,
CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->
```
Linux soak 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64 x86_64
x86_64 GNU/Linux
```
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