Hey Ronny, First to make the data more readable use a top snapshot to illustrate the memory usage. Second, use Squid 5.6 and not 5.2 The issue is not necessarily because of the Squid version but other things. We should narrow down the issues as any other Squid issue. First upgrade to 5.6 and then we need the top snapshot. After that we need snapshots of cache-manager pages. To dump snapshots of the cache manager pages you can use the next script: https://gist.githubusercontent.com/elico/8790bdc835d8e9ecbc57e72fc31effc0/raw/60d140b0e772fa4f418779bfc27e4804a345ce23/dump-cache-mgr-to-file.sh I am using it like this: /usr/local/bin/dump-cache-mgr-to-file.sh 2>&1 | tee “cachemg-data$(date +%Y-%m-%d_%H-%M-%S)” Try to take couple dumps with 4.1 and 5.6 (if you want 5.2 also) and upload the snapshots to somewhere in a zip file. Just take into account that these snapshots may contains confidential data so you are advised to review them and deduct specific parts of them before making them public. Just an advice, A machine that should handle “max_filedescriptors 40960” ie above 16k should have more RAM ie 8-16 GB as a starter. All The Bests, Eliezer ---- Eliezer Croitoru NgTech, Tech Support Mobile: +972-5-28704261 Email: ngtech1...@gmail.com <mailto:ngtech1...@gmail.com> Web: https://ngtech.co.il/ My-Tube: https://tube.ngtech.co.il/ From: squid-users <squid-users-boun...@lists.squid-cache.org> On Behalf Of Ronny Preiss Sent: Monday, 11 July 2022 9:55 To: squid-users@lists.squid-cache.org Subject: [squid-users] Sqid uses all RAM / killed by OOM 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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