RE: caching magic (was: How to trace activity on Window platform ?)

[Quanah Gibson-Mount <quanah@stanford.edu>]

--On Thursday, June 17, 2004 2:28 PM -0500 "Armbrust, Daniel C." 
<Armbrust.Daniel@mayo.edu> wrote:

>  >> - what does shm_key do again?
>
> > Allocates the DB database memory to use a shared memory segment (RAM)
> > rather than disk-based memory environment.  It dramatically improves
> > data  load times among other things.
>
> Could you give an example of how to use/set this?  I looked at the
> Berkeley docs... And I certainly didn't realize this from their
> documentation.  Maybe I looked at the wrong thing.
>
> This goes in the DB_CONFIG file, I assume?  I see it requires an int -
> does it really matter what I pick?  I gather from the docs that it is
> just a key.

No, it goes in slapd.conf in OpenLDAP 2.2 or later.  It is documented in 
the slapd-bdb manpage:

    shm_key <integer>
         Specify a key for a shared memory BDB  environment.  By
         default  the  BDB environment uses memory mapped files.
         If a non-zero value is specified, it will  be  used  as
         the  key  to  identify a shared memory region that will
         house the environment.


> From my slapd.conf:

database    bdb
shm_key     5


--Quanah

--
Quanah Gibson-Mount
Principal Software Developer
ITSS/Shared Services
Stanford University
GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html