IDL cache info (was re: openldap versions and silent exit)

[Howard Chu <hyc@symas.com>]

Rich Graves wrote:

> On Wed, 11 Aug 2004, Quanah Gibson-Mount wrote:
> > Howard gave me a general rule of thumb:
>
> > For BDB, idlcachesize should be equal to cachesize in slapd.conf
>
> > For HDB, idlcachesize should be 3 times cachesize in slapd.conf.

> Howard, why the difference?

I touched on this in a previous reply. back-hdb manages its DN info 
differently than back-bdb; in simple terms, it uses a large number of 
small IDLs while back-bdb uses a smaller number of large IDLs.

> Do the internal cache structures get slower with size?

Not appreciably. They're AVL trees, so they stay pretty efficient as the 
number of cache items grows.
--
  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support