Re: [389-users] How to increase the number of DB locks on the 389 Directory

"Glenn Machin" <gmachin@xxxxxxxxxx> · Tue, 14 Jun 2011 11:03:16 -0600



    Looking at the source code - I fixed the problem by doing the
    following.   If there is an easier way let me know.

    
    Shutdown down the 389 directory
    

    Edited /etc/dirsrv/slapd-SERVER/dse.ldif
    

    Under dn: cn=config,cn=ldbm database,cn=plugins,cn=config
    

    added attribute:
    

    nsslapd-db-locks: 40000
    

    Dumped the userRoot DB
    

    /usr/lib64/dirsrv/slapd-SERVER/db2ldif -n userRoot
    

    (Note this starts slapd so you have to stop the server again)
    

    Reload userRoot
    

    /usr/lib64/dirsrv/slapd-SERVER/ldif2db -n userRoot -i
    /var/lib/dirsrv/slapd-SERVER/ldif/SERVER-userRoot-DATE.ldif
    

    Start the server
    

    Looked at the configuration attributes:
    

    ldapsearch -h localhost -p 389 -D "cn=directory manager" -W -x -b
    "cn=database,cn=monitor,cn=ldbm database, cn=plugins,cn=config"
    objectclass=* | grep lock
    

    nsslapd-db-configured-locks is now set to 40000
    

    Glenn

    
    On 6/14/11 8:29 AM, Glenn Machin wrote:
    
      
      I am getting the error below form my Version 1.2.8.2 (Build
      2011.104.231) 389 Directory Server:

      "libdb: Lock table is out of available locks"

      
      The cn=database,cn=monitor,cn=ldbm database, cn=plugins,cn=config
      show the following:

      nsslapd-db-configured-locks: 10000

        nsslapd-db-current-locks: 40

        nsslapd-db-max-locks: 10000

      
      Its clear I am reaching the max number of locks of 10000.  
      However I don't know how to increase the value of
      nsslapd-db-configured-locks

      
      The RedHat Directory documentation talks about increasing the
      value through the attribute:

      cn=config,cn=ldbm database,cn=plugins,cn=config :
          nsslapd-db-locks

          
          However this did not origiinally exist and even when it was
          added it did not change the value of nsslapd-db-configured-locks

      
      How do I increase the value of nsslapd-db-configured-locks?

      
      Thanks for any help you can provide.

      
      Glenn

      
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