Preventing connection problems with multiple LDAP sessions

On the Microsoft Windows operating system, the IBM® Security Directory Server supports a default of 64 concurrent connections.

Connection attempts beyond 64 connections from the Verify Identity Governance Server fail and display a Directory Server not available error message like this example:
Connection pool exceeded: directory server not available
To limit connection problems, define the value of SLAPD_OCHANDLERS to increase the available connections.
  1. Locate the following stanza in the ibmslapd.conf file:
    dn: cn=Front End, cn=Configuration

    The default directory of the ibmslapd.conf file depends on the operating system.

    Microsoft Windows systems
    C:\idssldap-ldapdb2\etc
    UNIX and Linux® systems
    /home/ldapdb2/idsslapd-ldapdb2/etc
  2. Add the following line to this stanza:
    ibm-slapdsetenv: SLAPD_OCHANDLERS=number-of-threads
    One thread supports 64 connections. If there are multiple instances of the Verify Identity Governance Server, increase this value. If there are two instances of the server, each requiring a minimum of 50 simultaneous LDAP connections, specify a value of 2 or larger. For example, add this line to the following stanza:
    ibm-slapdsetenv: SLAPD_OCHANDLERS=4
  3. Save the changes.
  4. Restart the IBM Security Directory Server so that the changes take effect.