ev11 no available slots in the work items queue

Hi all,

I have an issue where indexing seems to be running behind more and more.

When dtracing EVIndexVerifyTask adn EVIndexVolumesProcessor, I see almost only the following entry:

{IndexVolumesManager} There are currently no available slots in the work items queue.

Is it possible to somehow clear that 'work items queue'? Restart indexing service? Reboot server? SQL?

Thanks.

GJ