[CalendarServer-users] Limitations on number events?

Sean McAvoy smcavoy at ripe.net
Tue Feb 17 04:53:57 PST 2009

I think I may have found something.
After importing a very large calendar I ran the calendar server from  
the terminal (not detached) and noticed 1000s of similar entires:
2009-02-17 13:46:05+0100 [-] [caldav-8009]  [-]  
Unable to find any record with email ***@ripe.net

Could it be that every single event with users attached to it a look  
up is done and fails? This would explain why large calendars cause  
problems. It would not however, explain why 1000 entries (no  
attendees) made in the iCal client results in an non-viewable calendar  
(others attempting to view it timeout).

On Feb 17, 2009, at 11:30, Sean McAvoy wrote:

> On Feb 13, 2009, at 21:17, Cyrus Daboo wrote:
>> Hi Sean,
>> --On February 13, 2009 11:49:13 AM +0100 Sean McAvoy <smcavoy at ripe.net 
>> > wrote:
>>> I have tried this and found the same basic problem, other users  
>>> cannot
>>> access calendars with lots of events (tested 900-9500 event  
>>> calendars).
>>> Do you have any other suggestions on how to narrow down the problem?
>> Calendars of several thousand ought to be OK. A lot will depend on  
>> disk performance though - are you always using a local disk?
> Yes, I am always using local disk RAID 5 on 3 73GB SAS drives.  
> During the peak times I've run both top and iostat, top reports  
> python processes at 100%, iostat reports little activity.
> I have also created 1000 entries via the iCal client and experienced  
> the same problem, after removing 900 of the entires (using the  
> command line) the problem disappeared.
>> -- 
>> Cyrus Daboo
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