Bug#419222: [Pkg-openldap-devel] Bug#419222: slapd.conf

[Quanah Gibson-Mount]

--On Sunday, April 15, 2007 11:22 AM +0200 Gyuris Szabolcs 
<szimszon at oregpreshaz.eu> wrote:

> Hi Quanah!
>
> Here it is the slapd.conf.
>
> But I think the large number of threads is because after the slapd froze
> then all connected client froze too. :(

Hi Gyuris,

In looking at your slapd.conf file, I don't see any checkpoint directive. 
When slapd goes to shutdown, one of the things it does is flush everything 
from the Berkeley DB cache to disk.  If you do not have a checkpoint 
directive, and a large number of writes have occurred, this can be 
particularly time consuming, as all changes since the last startup must be 
flushed.  Setting the checkpoint directive will have slapd periodically 
write out what changes have occurred to disk, so that the amount of time it 
takes to shut down is significantly reduced.

>From the slapd-bdb(5) man page:

     checkpoint <kbyte> <min>
          Specify the frequency for  checkpointing  the  database
          transaction  log.   A  checkpoint operation flushes the
          database buffers to disk and writes a checkpoint record
          in  the  log.   The  checkpoint  will  occur  if either
          <kbyte> data has been written  or  <min>  minutes  have
          passed  since  the  last  checkpoint.   Both  arguments
          default to zero, in which case they are  ignored.  When
          the  <min>  argument is non-zero, an internal task will
          run every <min> minutes to perform the checkpoint.  See
          the Berkeley DB reference guide for more details.


I'm not 100% sure that this is the issue you are having, but it is 
certainly a possibility.  Can you try adding the directive and see if it 
helps?  I've been using back-hdb on my directory deployment @ Stanford for 
the entire 2.3 release and haven't had issues with it shutting down 
properly.  It is hard to tell from the information here if the issue is 
really slapd locking up, or simply slapd taking a while to shut down.

Regards,
Quanah

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