Re: caching magic

[Howard Chu <hyc@symas.com>]

Tony Earnshaw wrote:

> tor, 17.06.2004 kl. 22.47 skrev Howard Chu:
> > > > database    bdb
> > > > shm_key     5
> >
> > > This can go in DB_CONFIG:
> > > http://www.sleepycat.com/docs/api_c/env_set_shm_key.html
> >
> > No, that alone is not enough. If it were enough by itself, I would never 
> > have added this code to back-bdb. You also need to set the DB_SYSTEM_MEM 
> > flag when creating the environment, and this flag cannot be set in 
> > DB_CONFIG. Using the shm_key keyword tells back-bdb the key *and* tells 
> > it to set the flag when creating the environment.

> Could you please indicate where setting DB_SYSTEM_MEM and any other
> similar environment parameters is documented? Wish to read up on it :)

This is not a user-settable flag, it's part of the back-bdb code that 
invokes the BDB library. Go ahead and read up on DB_ENV->open for the 
details, but it is irrelevant if you're not writing actual C code. While 
this overall email thread may be relevant for OpenLDAP users, this 
particular keyword is not.
--
  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support