On Tue, 2007-03-20 at 15:47 -0500, Mike McGrath wrote: > I've been examining more closely why wiki saves are slow. At this time > it appears the issue is in notifications. More to the point, > determining who to notify. Our wiki supports regex for page > notifications. This means that when you save a page, Moin has to > iterate over all users (currently about 10,000 registered) before it > knows who to notify. Actually sending the notifications doesn't take > that long, but figuring out who to mail can take a long long time. My > tests show between 30 and 95 seconds. When I disabled notifications > saves dropped to 2-3 seconds. I'm not sure what to do from here but it > looks like it will take a code change (I'm working with some guys in > #moin). I'm continuing to look into it but wanted to let everyone know > what was going on. I can think of two possibilities for speeding this up:: 1) Make the notifications async. Save a notification message into a queue. A worker thread/process processes the queue for who needs to be alerted to this. 2) On page creation and notification preference changes, update a list of which people should be notified of changes. Then you can just use this list when sending the notification. I've got a bit too much other stuff to do to take one of these on right now, though. -Toshio
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