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authorSuren A. Chilingaryan <csa@suren.me>2018-03-23 06:51:23 +0100
committerSuren A. Chilingaryan <csa@suren.me>2018-03-23 06:51:23 +0100
commitc163108c0c0c7b7a4f05da411e98ac0f503e31e0 (patch)
tree4934d1b2e98b0e8a94816848e44496e009e6755f /docs/troubleshooting.txt
parentcba41110aa086553192ed5a309a6b8031812c221 (diff)
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Fix critical bug in docker provisioner, improve mysql performance, provision system users/groups to enable NFS group mapping, various minor fixes
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diff --git a/docs/troubleshooting.txt b/docs/troubleshooting.txt
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@@ -244,6 +244,17 @@ Storage
or again we can compare lvm volumes which are used by Gluster bricks and which are not. The later
ones should be cleaned up. Again there is the script.
+MySQL
+=====
+ - MySQL may stop replicating from the master. There is some kind of deadlock in multi-threaded SLAVE SQL.
+ This can be seen by exexuting (which should show a lot of slave threads waiting on coordinator to provide
+ load).
+ SHOW PROCESSLIST;
+ The remedy is to restart slave MySQL with 'slave_parallel_workers=0', give it a time to go, and then
+ restart back in the standard multithreading mode.
+
+
+
Performance
===========
- To find if OpenShift restricts the usage of system resources, we can 'rsh' to container and check