From b48b69c6ca7c88f1a3c0ca84318cdd2211be8749 Mon Sep 17 00:00:00 2001
From: Michael Sherman <shermanm@uchicago.edu>
Date: Fri, 24 Jan 2025 14:09:20 -0600
Subject: [PATCH] reduce mariadb ram usage

kolla has mariadb default to using 40% of available memory, up to a max
of 8GB. This has been causing OOM errors on chi@edge, so this drops the
ratio to 20%.
---
 kolla/node_custom_config/galera.cnf | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 kolla/node_custom_config/galera.cnf

diff --git a/kolla/node_custom_config/galera.cnf b/kolla/node_custom_config/galera.cnf
new file mode 100644
index 00000000..2dca2ad5
--- /dev/null
+++ b/kolla/node_custom_config/galera.cnf
@@ -0,0 +1,7 @@
+[mysqld]
+{% set dynamic_pool_size_mb = (hostvars[inventory_hostname].ansible_facts.memtotal_mb * 0.2) | round | int %}
+{% if dynamic_pool_size_mb < 8192 %}
+innodb_buffer_pool_size = '{{ dynamic_pool_size_mb }}M'
+{% else %}
+innodb_buffer_pool_size = '8192M'
+{% endif %}