The only times I get it slow is when the forums doing something, backups it will grind to a halt while it backs up, it won't do anything (I think 1am, 11am, 4pm and 8pm but not 100% without looking at the crons - that I run), but the forum also has clean up crons it runs at various times and with a database that is 8gb these crons can and will be intensive).
I mean are these slow times all day or are they just occasional occurrences?
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