System Administrator Guide > System Administrator Guide > Understanding Ingres Management Architecture > Query Examples on IMA Tables > Example: Who Is Holding a Lock that Other Sessions Need?
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Example: Who Is Holding a Lock that Other Sessions Need?
The following query shows which sessions on the local VNODE are holding locks where other sessions are waiting:
update ima_mib_objects
set    value        = DBMSINFO('IMA_VNODE')
where  classid      = 'exp.gwf.gwm.session.control.add_vnode'
and    instance     = '0'
and    server       = DBMSINFO('IMA_SERVER');
 
select distinct
       resource_id,
       lock_id,
       lock_state,
       ima_locklists.locklist_id,
       locklist_server_pid,
       locklist_session_id,
       effective_user,
       db_name,
       session_terminal
       from
       ima_locks,
       ima_locklists,
       ima_server_sessions
where resource_id in
       (
       select distinct
              ima_locks.resource_id
       from
              ima_locks
       where lock_state != 'GR'
       )
and lock_state != 'WT'
and ima_locks.locklist_id = ima_locklists.locklist_id
and ima_locklists.locklist_server_pid = ima_server_sessions.server_pid
and ima_locklists.locklist_session_id = ima_server_sessions.session_id;
Last modified date: 04/03/2024