As part of this werk, there was an additional step for systemd-based systems that you need to perform regarding mk_oracle.
Ideally, you only need to move mk_oracle from /usr/lib/check_mk_agent/mk_oracle to /usr/lib/check_mk_agent//mk_oracle. The recommended number as per the werk is 60.
In your case, you have chosen 300. I have some more questions:
- Are there any other plugins/local checks executed by the agent ?
- What is the normal check interval/retry check interval of the Check_MK service check of this host?
- Any “Service check timeout” rule defined for the Check_Mk service check ?
- Can you share the output of: ls -l /var/lib/check_mk_agent/cache ?
- Is it possible to reproduce the problem with 2 CDB’s running on a single server ?