matrix.archlinux.org: Reduce PostgreSQL memory usage

It ran out of memory, with Postgres using a lot of RSS.

matrix.archlinux.org: Reduce PostgreSQL memory usage
It ran out of memory, with Postgres using a lot of RSS.
ba1f1a5b · Jan Alexander Steffens (heftig) · a6e49930 · ba1f1a5b
Verified Commit ba1f1a5b authored Nov 10, 2020 by Jan Alexander Steffens (heftig)
--- a/playbooks/matrix.archlinux.org.yml
+++ b/playbooks/matrix.archlinux.org.yml
@@ -14,10 +14,10 @@
    - { role: certbot }
    - { role: nginx }
    - role: postgres
-      postgres_shared_buffers: 1024MB
+      postgres_shared_buffers: 512MB
      postgres_work_mem: 64MB
-      postgres_maintenance_work_mem: 1GB
-      postgres_effective_cache_size: 3GB
+      postgres_maintenance_work_mem: 256MB
+      postgres_effective_cache_size: 1GB
    - role: postfix
      postfix_relayhost: "mail.archlinux.org"
    - { role: matrix }