Update notes for 2017-08-31

content/post/2017-08.md

@@ -375,3 +375,13 @@ dspace=# select handle from item, handle where handle.resource_id = item.item_id
 - I notice that in many WLE collections Marianne Gadeberg is in the edit or approval steps, but she is also in the groups for those steps.
 - I think we need to have a process to go back and check / fix some of these scenarios—to remove her user from the step and instead add her to the group—because we have way too many authorizations and in late 2016 we had [performance issues with Solr](https://github.com/ilri/rmg-ansible-public/commit/358b5ea43f9e5820986f897c9d560937c702ac6e) because of this
 - I asked Sisay about this and hinted that he should go back and fix these things, but let's see what he says
+- Saw CGSpace go down briefly today and noticed SQL connection pool errors in the dspace log file:
+
+```
+ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL connection Error
+org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
+```
+
+- Looking at the logs I see we have been having hundreds or thousands of these errors a few times per week in 2017-07 and almost every day in 2017-08
+- It seems that I changed the `db.maxconnections` setting from 70 to 40 around 2017-08-14, but Macaroni Bros also reduced their hourly hammering of the REST API then
+- Nevertheless, it seems like a connection limit is not enough and that I should increase it (as well as the system's PostgreSQL `max_connections`