[squid-users] Significant memory leak with version 5.x (not with 4.17)

[Amos Jeffries]

On 25/12/21 01:24, Lukáš Loučanský wrote:
> Sorry - maybe I'll post something irrelevant - but my Squid5.3 is 
> running for 3 days now. As it seems the number of user's requests 
> declined (xmas holliday) - the memory consuption stabilized and is not 
> increasing (seemingly - I check only by mrtg figures - I'dont sample 
> memory info because it seemed not prooffing)
> 
> Anyway general info shows:
> 
> Maximum Resident Size: 48399664 KB Page faults with physical i/o: 171 
> Memory accounted for: Total accounted: 2013907 KB memPoolAlloc calls: 
> 390527804 memPoolFree calls: 395188267 Max resident size 46GB???


Hi Lukáš ,

  This particular value is known to sometimes receive weird/garbage 
values from the libc API on 64-bit systems, and combines *all* active 
Squid processes. So be skeptical and prefer OS tools if this matters. 
Your top output shows a more trustworthy 11 GB resident size for (one 
of?) the Squid worker process.


> Memory 
> allocated total: 2014463 kB. PID USER      PR  NI    VIRT    RES    SHR 
> S  %CPU  %MEM     TIME+ COMMAND

> 15487 proxy     20   0   11.6g  11.5g  
> 10344 S   0.0  73.7 103:34.23 (squid-1) --kid squid-1 -YC -f 
> /etc/squid5/squid.conf Is it something not included in the memory 
> utilization chart?

Hopefully not, but it could be something not using Squid Memory pools 
tracking.


> Something tied to connections? requests? ssl contexts? L
> 

"yes maybe" to all the above.


Amos