Hi @manojr2k,
stale services can have multiple causes.
One reason could be a performance issue of the Checkmk Server. Maybe your Checkmk server can’t handle the amount of work to check everything in time. I assume you a using the default 1 minute check interval.
Can you please check in your sidebar the Service Speed-O-Meter if your scheduled rate is fulfilled or not?
Example:
Another helpful indicator would be the Monitoring Core statistics snap-in:
The size of your monitoring and the used hardware specs of your Checkmk Server are also important.
Based on another post, I assume you changed the checker amount to 2?
Is the problem happening since then?
Thanks in advance.
Norm