[squid-users] Fwd: Sqid uses all RAM / killed by OOM

[Alex Rousskov]

On 7/25/22 01:59, Ronny Preiss wrote:

> Can someone support me regarding my question about compiling squid 5.6 
> on ubuntu 22.04?

There is probably some misunderstanding: You are expecting some kind of 
a patch for Squid v5.6, but I do not know what patch you are talking 
about. I am aware of one important bug fix that was added to Squid v5 
after v5.6 release[1], but that fix is not targeting any memory leaks 
(it may still fix some as a side effect though).

I also do not recall any known memory leaks in v5.6, but perhaps I have 
forgotten something we fixed in master/v6 long time ago -- until [1], it 
was not possible to run v5 in production deployments I dealt with, so I 
can easily forget or miss some old v5 details.

If you believe that your Squid v5.6 is leaking memory, try [1]. If that 
does not help, you may need to create a bug report on Bugzilla and start 
collecting the necessary details to confirm the leak and identify what 
is leaking.

[1] https://github.com/squid-cache/squid/commit/c999621.diff


HTH,

Alex.



> Since my previous attempts also have the "memory leak" on ubuntu 22.04 
> and squid 5.6 problem again.
> 
> Kind regards Ronny
> 
> ---------- Forwarded message ---------
> Von: *Ronny Preiss* <ronny.preiss at gmail.com <mailto:ronny.preiss at gmail.com>>
> Date: Mo., 11. Juli 2022 um 08:54 Uhr
> Subject: Sqid uses all RAM / killed by OOM
> To: <squid-users at lists.squid-cache.org 
> <mailto:squid-users at lists.squid-cache.org>>
> 
> 
> Hello all,
> 
> I have the following problem with squid 5.2 on ubuntu 22.04.
> Squid consumes all ram and the entire SWAP. When swap and ram are 
> completely full, the OOM killer strikes and terminates the process.
> 
> We use three internal child proxy servers with keepalived and haproxy as 
> load balancers. From our ISP we use a parent upstream proxy for external 
> internet traffic.
> As an operating system we have so far Ubuntu 20.04.4 with squid 4.1 in 
> use. This constellation works flawlessly.
> 
> Now I want to update the Server to Ubuntu 22.04 and squid 5.2. But with 
> Ubuntu 22.04 and squid 5.2 the above mentioned problem with the OOM 
> Killer occurs.
> The new machine has only the OS and squid installed.
> 
> Who can help me with a solution?
> 
> With kind regards
> Ronny
> 
> Attached the squid configuration and the VMWare specs.
> 
> ### VM Specs ###
> OS: Ubuntu 22.04 Server
> CPU: 4x (Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz)
> RAM: 4 GB
> VMWare: ESXi 7.0 U2
> 
> ### CONFIG ###
> acl 10.172.xxx.xxx/18 <http://10.172.128.0/18> src 10.172.xxx.xxx/18 
> <http://10.172.128.0/18>
> acl 172.16.xxx.xxx/12 <http://172.16.0.0/12> src 172.16.xxx.xxx/12 
> <http://172.16.0.0/12>
> acl 192.168.xxx.xxx/16 <http://192.168.0.0/16> src 192.168.xxx.xxx/16 
> <http://192.168.0.0/16>
> 
> acl Safe_ports port 80
> acl Safe_ports port 21
> acl Safe_ports port 443
> acl Safe_ports port 70
> acl Safe_ports port 210
> acl Safe_ports port 1025-65535
> acl Safe_ports port 280
> acl Safe_ports port 488
> acl Safe_ports port 591
> acl Safe_ports port 777
> 
> http_access allow 10.172.xxx.xxx/18 <http://10.172.128.0/18> Safe_ports
> http_access allow 172.16.xxx.xxx/12 <http://172.16.0.0/12> Safe_ports
> http_access allow 192.168.xxx.xxx/16 <http://192.168.0.0/16> Safe_ports
> 
> http_access allow localhost manager
> http_access allow localhost
> http_access deny manager
> http_access deny all
> 
> include /etc/squid/conf.d/*
> http_port 10.172.xxx.xxx:3128 <http://10.172.128.34:3128>
> 
> cache_peer 10.210.xxx.xxx parent 8080 0
> cache_dir ufs /var/spool/squid 3000 16 256
> cache_effective_user proxy
> cache_effective_group proxy
> 
> coredump_dir /var/spool/squid
> 
> refresh_pattern ^ftp:           1440    20%     10080
> refresh_pattern ^gopher:        1440    0%      1440
> refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
> refresh_pattern \/(Packages|Sources)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
> refresh_pattern \/Release(|\.gpg)$ 0 0% 0 refresh-ims
> refresh_pattern \/InRelease$ 0 0% 0 refresh-ims
> refresh_pattern \/(Translation-.*)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims
> refresh_pattern .               0       20%     4320
> 
> never_direct allow all
> max_filedescriptors 40960
> dns_nameservers 10.244.xxx.xxx
> 
> ### DMESG ###
> 
> [256929.150801] 
> oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/system.slice/squid.service,task=squid,pid=26390,uid=13
> [256929.150822] Out of memory: Killed process 26390 (squid) 
> total-vm:9691764kB, anon-rss:3657748kB, file-rss:2320kB, shmem-rss:0kB, 
> UID:13 pgtables:18932kB oom_score_adj:0
> [256929.510641] oom_reaper: reaped process 26390 (squid), now 
> anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
> 
> 
> 
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