Re: filter preprocessing for performance improvement

[Jon Roberts <jon@jonanddeb.net>]

Francis Swasey wrote:
> On 3/2/07 12:51 PM, Eric Irrgang wrote:
> > I have a problem in that the first time someone performs a search for 
> > 'objectclass=*' after slapd is restarted, the server is really bogged 
> > down for a while.  Once the search has completed once, this is not a 
> > problem. I assume that's due to the IDL cache.  However, I currently 
> > have to keep the server unavailable after restarting slapd for upwards 
> > of half an hour while I do an 'objectclass=*' search the first time.
>  
> Does your server have an index for objectclass?

I was just today thinking about something along the lines of filter 
preprocessing (at the client level actually) that prevented say a 
contains search like (telephonenumber=*67530*) on an attribute that the 
directory has not indexed for substring searches (case of 
telephonenumber). Something at the server level would be better of course.

Jon Roberts