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OpenDarwin 7.2.1 - man page for slapd-bdb (opendarwin section 5)

SLAPD-BDB(5)			       File Formats Manual			     SLAPD-BDB(5)

       slapd-bdb - BDB backend to slapd


       The  BDB  backend  to slapd(8) is the recommended backend for a normal slapd database.  It
       uses the Sleepycat BerkelyDB package to store data.  It makes extensive	use  of  indexing
       and caching to speed data access.

       These  slapd.conf  options apply to the BDB backend database.  That is, they must follow a
       "database bdb" line and come before any subsequent "backend" or "database"  lines.   Other
       database options are described in the slapd.conf(5) manual page.

       cachesize <integer>
	      Specify  the  size  in entries of the in-memory cache maintained by the BDB backend
	      database instance.  The default is 1000 entries.

       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.  See the Berkeley DB reference guide for more

	      Specify  that on-disk database contents should not be immediately synchronized with
	      in memory changes.  Enabling this option may improve performance at the expense  of
	      data security.

       directory <directory>
	      Specify  the  directory where the BDB files containing this database and associated
	      indexes live.  A separate directory must	be  specified  for  each  database.   The
	      default is /var/db/openldap/openldap-data.

	      Allow  reads of modified but not yet committed data.  Usually transactions are iso-
	      lated to prevent other operations from accessing uncommitted data.  This option may
	      improve  performance,  but  may  also return inconsistent results if the data comes
	      from a transaction that is later aborted.  In this case, the modified data is  dis-
	      carded and a subsequent search will return a different result.

       index {<attrlist>|default} [pres,eq,approx,sub,<special>]
	      Specify  the  indexes  to maintain for the given attribute (or list of attributes).
	      Some attributes only support a subset of indexes.  If only an <attr> is given,  the
	      indices specified for default are maintained.  Note that setting a default does not
	      imply that all attributes will be indexed.

	      A number of special index parameters may be specified.  The index type sub  can  be
	      decomposed  into subinitial, subany, and subfinal indices.  The special type nolang
	      may be specified to disallow use of this index by language subtypes.   The  special
	      type  nosubtypes	may be specified to disallow use of this index by named subtypes.
	      Note: changing index settings requires rebuilding indices, see slapindex(8).

       lockdetect {oldest|youngest|fewest|random|default}
	      Specify which transaction to abort when a deadlock is detected.  The default is the
	      same as random.

       mode <integer>
	      Specify  the  file  protection  mode that newly created database index files should
	      have.  The default is 0600.

       searchstack <depth>
	      Specify the depth of the stack used for search filter evaluation.   Search  filters
	      are evaluated on a stack to accomodate nested AND / OR clauses. An individual stack
	      is assigned to each server thread.  The depth of the stack determines how complex a
	      filter can be evaluated without requiring any additional memory allocation. Filters
	      that are nested deeper than the search stack depth will cause a separate	stack  to
	      be  allocated  for  that	particular search operation. These allocations can have a
	      major negative impact on server performance, but specifying  too	much  stack  will
	      also  consume a great deal of memory.  Each search stack uses 512K bytes per level.
	      The default stack depth is 16, thus 8MB per thread is used.

	      default slapd configuration file

       slapd.conf(5), slapd(8), slapadd(8), slapcat(8), slapindex(8).

OpenLDAP 2.1.X				   RELEASEDATE				     SLAPD-BDB(5)

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