2015-11-22 CGSpace went down Looks like DSpace exhausted its PostgreSQL connection pool Last week I had increased the limit from 30 to 60, which seemed to help, but now there are many more idle connections: $ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace 78 For now I have increased the limit from 60 to 90, run updates, and rebooted the server 2015-11-24 CGSpace went down again Getting emails from uptimeRobot and uptimeButler that it’s down, and Google Webmaster Tools is sending emails that there is an increase in crawl errors Looks like there are still a bunch of idle PostgreSQL connections: $ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace 96 For some reason the number of idle connections is very high since we upgraded to DSpace 5 2015-11-25 Troubleshoot the DSpace 5 OAI breakage caused by nginx routing config The OAI application requests stylesheets and javascript files with the path /oai/static/css, which gets matched here: # static assets we can load from the file system directly with nginx location ~ /(themes|static|aspects/ReportingSuite) { try_files $uri @tomcat; ...