Yes, forum is quite large, about 2,000,000 posts and over 1000 users online in the daytime.
I'll try to dig further, but fact stands as it is: only yesterday on the same hardware with vb2 fulltext search server load was around 2-3 in daytime and less than 1.0 in night time, whereas today it sometimes spikes to 30.0, and I'm seeing hundreds of locked mysql threads besides running search query.
Not acceptable - I had to disable search completely for now (BTW, global "enablesearches" setting in admin CP is currently broken).
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