Thanks in advance.

I've just installed OP using the Yum repos on a Centos 7 server. It was running well for a day or two now suddenly I have high cpu

[root@lsapp01 dtaylor]# ps -waxu | grep ruby 
openpro+ 29943 97.1  2.9 586120 117532 ?       Rsl  22:05   0:05 /opt/openproject/vendor/bundle/ruby/2.5.0/bin/unicorn --config-file config/unicorn.rb --host 127.0.0.1 --port 6000 --env production 
openpro+ 29980  105  2.4 437344 100540 ?       Rsl  22:05   0:05 /opt/openproject/vendor/bundle/ruby/2.5.0/bin/rake jobs:work 
root     30015  0.0  0.0 112720  2264 pts/0    S+   22:05   0:00 grep --color=auto ruby 

I haven't done much with it yet just set up a project with about 20 tasks.

Environment is CentOS Linux release 7.6.1810 (Core) and is up to date.

The web server is 

Server version: Apache/2.4.6 (CentOS) 
Server built:   Nov  5 2018 01:47:09 

Any help would be great, it's a brilliant application other than his hiccup

Solved, the DB had crashed. Would be good to have better error handling than just high cpu though

I am having the same issue.  Can you show the commands you used to clear this up?