Memory Allocation error. errcode 520>

My server appears to be running okay and E-Mails are getting in an out but looking through JConsole, I am getting the following repeated errors.

Should I be concerned?

Do I need to reboot to sort?

06/04/2004 09:51:22 Error full text indexing document NT0002096A e:\Lotus\Domino\Data\mtdata\mtstore.ft (rc=3892) Not enough memory for Full Text Indexing or Search

06/04/2004 09:51:27 Full Text message: Memory allocation error. errcode = 520

Thank you for any pointers / assistance.

Subject: Memory Allocation error. errcode 520>

And now I am getting issues on the console like MT Collector Failed updating entry in message tracking store [inmsgid] = xxxxxxxxx@xxxxx.com No documents found