makehistory performance

[Richard Michael Todd]

In message <NDBBKHFIKKIHKJOOJDPOCEBDCEAA.George.Lindholm at ubc.ca>you write:
>Some more trivia (tagged hash disabled):
>
>'makedbz -i' took 75 minutes to run.
>On the other hand, 'makedbz -s 2014512 -i' took 4 minutes.

Yes.  You *always* want to have the dbz index size (-s) set to about the right
size to match your history file, or performance will suffer badly. 

>makedbz also complained about 133701 'Duplicate message-id's in
>history. A random check seems to prove it right.

As I said, you probably had the index tables overflow while building up
your history file, which tagged hash does not handle gracefully.  I think
I'll submit a patch later today to make innd throttle itself in that case 
rather than continue on and possibly accept duplicates.