matrix: Raise postgres_effective_cache_size

Seems we run at about 5GB of cache. Let postgres assume it gets 4GB.

matrix: Raise postgres_effective_cache_size
Seems we run at about 5GB of cache. Let postgres assume it gets 4GB.
458217f4 · Jan Alexander Steffens (heftig) · db362074 · 458217f4
Verified Commit 458217f4 authored Dec 12, 2020 by Jan Alexander Steffens (heftig)
--- a/playbooks/matrix.archlinux.org.yml
+++ b/playbooks/matrix.archlinux.org.yml
@@ -17,7 +17,7 @@
      postgres_shared_buffers: 1GB
      postgres_work_mem: 64MB
      postgres_maintenance_work_mem: 256MB
-      postgres_effective_cache_size: 2GB
+      postgres_effective_cache_size: 4GB
      postgres_jit: 'off'
    - role: postfix
      postfix_relayhost: "mail.archlinux.org"