Seems that it occurs when topic title has been changed, although that might be a month ago.

Edited June 19, 20231 yr by Canis

Please could you provide me an example of what you mean here?

See Client area for more information.

I see what you mean there. In the first instance, please rebuild your search index from System>Settings>Search. This will clear that issue. If you then see it happen again, please let me know in this topic and we can take a further look

Thanks, I will report back when rebuild is finished. So far 1.82%.

Indexing for 48 hours now and still only 48%.
It's set up as cron and we have a dedicated server that's only used for the forum.

Forum is painfully slow in response. Is it possible to schedule so it runs at night only? Or give the process a lower priority?
Can it be stopped once started?

 

There is no way in which to do any of those, unfortunately. If you have a large site, it will take some time. It shouldn't really be affecting performance on your site, however, as they are run the background. If they are, your MySQL instance is likely allowing too much resource to individual queries, would be my guess.

18 hours ago, Marc Stridgen said:

your MySQL instance is likely allowing too much resource to individual queries

Is this something that we can adjust?
Forum is running painfully slow and it's still at 64%.

That is mysql configuration. You would need to contact your hosting company on this

Rebuild is finished and those search errors seems to be corrected. Took 4 days with approx. 2 mill. posts.

Is it a known bug that changed titles might not be updated in the index?

Its not, no. It should be updating them. This is why you would need to let us know if you see that happen again in the future