Changing parameter values on Linux or the UNIX system

About this task

On UNIX systems and Linux, you should specify one set of parameter values for all VOBs on the host.

Procedure

  1. To change parameter values that apply to all VOBs on a host, open the file /opt/hcl/ccm/versionvault/config/vob/db/vob_almd_params. It contains one line of the following format: 
     –u num –q num
    This file must be owned by root and set to read-only access.
    Note: For information about using vob_almd_params, see The lock manager in HCL VersionVault on the UNIX system and Linux.
  2. Edit the file, referring to the following descriptions of the parameters:

    –u num (Default: 256)
    Specifies the maximum number of simultaneous db_server or vobrpc_server connections to a VOB.

    Each active view_server process accesses a VOB through a vobrpc_server process, which has a single connection per process. In addition, end-user operations use a db_server process to access a VOB, and a single db_server has a single connection to a VOB. There can be up to five connections for each user.

    –q num (Default: 1024)
    Specifies the number of lock requests that can be queued. When more than num lock requests are outstanding, the excess requests are dropped. Poor user response time and messages of the form

    db_VISTA database -922: lockmgr is busy

    in the db_server_log or vobrpc_server_log files may indicate that the value of –q should be raised, as follows:
    • Schema 80 and 81 VOBs: seven times the value of –u.
    • Schema 54 and 55 VOBs: no less than five times the value of –u.