From cdf6a5e1c7cd3e3759946cb86ad2a3b7034f1496 Mon Sep 17 00:00:00 2001
From: Mikolaj Izdebski <mizdebsk@redhat.com>
Date: Mon, 18 Apr 2016 14:06:58 +0000
Subject: [PATCH] Limit koschei-resolver memory usage

This limits real memory usage, virtual memory is not limited -
resolver won't use more than 2G of *real* memory (RAM), virtual memory
exceeding that limit will be swapped to disk.

This should leave more real memory for other services and disk cache,
while allowing koschei-resolver to keep older sacks in swap (loading
sack from swap should be faster than reloading it from repo files).
---
 roles/koschei/backend/files/systemd-memory-limit.conf |  2 ++
 roles/koschei/backend/tasks/main.yml                  | 11 +++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 roles/koschei/backend/files/systemd-memory-limit.conf

diff --git a/roles/koschei/backend/files/systemd-memory-limit.conf b/roles/koschei/backend/files/systemd-memory-limit.conf
new file mode 100644
index 0000000000..7c1c5fb8d3
--- /dev/null
+++ b/roles/koschei/backend/files/systemd-memory-limit.conf
@@ -0,0 +1,2 @@
+[Service]
+MemoryLimit=2G
diff --git a/roles/koschei/backend/tasks/main.yml b/roles/koschei/backend/tasks/main.yml
index 03fb5f7d4d..7f5fc97fd1 100644
--- a/roles/koschei/backend/tasks/main.yml
+++ b/roles/koschei/backend/tasks/main.yml
@@ -21,6 +21,17 @@
   - koschei
   - packages
 
+- name: install systemd config files
+  copy: >
+    src=systemd-memory-limit.conf
+    dest=/etc/systemd/system/koschei-resolver.service.d/memory-limit.conf
+  notify:
+  - reload systemd
+  - restart koschei-resolver
+  tags:
+  - koschei
+  - config
+
 - name: install config files
   when: env == "staging"
   template: >