[horde] Empty tables regurlarly

[Jan Schneider]

Zitat von lst_hoe02 at kwsoft.de:

> Zitat von Vilius Šumskas <vilius at lnk.lt>:
>
>>>
>>> Not really. The table is useful for finite historie eg. for SyncML but
>>> every system with always in and never out is doomed to fail some time
>>> in the future. I guess you also use logrotate on your machines, don't
>>> you.
>>> We don't have a problem with this today but i can imagine this can get
>>> you in trouble on a aging installation with thousands of busy users
>>> doing SyncML with all sort of devices.
>>
>> This is not how databases work. It doesn't really matter how much data (e.i.
>> rows) you have in the table. If the application programmed correctly and
>> database structure and setup done right it will always work fast. Database
>> doesn't need to go through all the rows to return 10 of them. Here we have
>> 15years old of data in our Oracle db with more than 15bilion rows in one
>> table, but queries run just as fast as before. The magic of indexes :)
>
> The fact that you *can* do it today should not be a excuse if it  
> doesn't make sense and it *may* lead to trouble. I fail to see why  
> one can need add/modify/delete records from years ago and users left  
> a long time already.

That's why there is the removeUserData API in Horde. There is no need  
to keep data that will never be used again. But removing data because  
it is old is just plain wrong and has nothing to do with housekeeping.

> Good housekeeping is never wrong.
>
>
>> If on the other hand you are seeing slowness in SyncML because of big
>> history table, then SyncML code needs to be fixed, not the other way around.
>
> As said we don't have trouble until now but i like to know in  
> advance before we bring features to broder public.
>
> Regards
>
> Andreas
>
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Jan.

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