Merge lp:~hloeung/ubuntu-repository-cache/reduce-squid-memory-usage into lp:ubuntu-repository-cache

[Haw Loeung]

Tune and reduce memory usage by Squid to avoid being OOM killed

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[Barry Price (barryprice)]

LGTM +1

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 349

=== modified file 'templates/squid-deb-proxy/squid-deb-proxy.conf'
--- templates/squid-deb-proxy/squid-deb-proxy.conf	2022-05-23 03:30:57 +0000
+++ templates/squid-deb-proxy/squid-deb-proxy.conf	2022-07-22 01:57:22 +0000
@@ -52,7 +52,13 @@
 
 # tweaks to speed things up
 {{ Cache_Memory_Config }}
-maximum_object_size_in_memory 30 MB
+
+# Reduce memory usage, memory caching is less relevant as instance storage is much faster than it was a few years ago.
+maximum_object_size_in_memory 2 MB
+# We also only want objects in memory if they're already on disk and seeing cache hits.
+memory_cache_mode disk
+# Don't have squid keeping pools of allocated (but unused) memory.
+memory_pools off
 
 collapsed_forwarding on