Documentation > ADMINISTRATOR GUIDE > Monitoring > Session Procedures

Session Procedures

Procedure	Description	Example
sys.setmemorylimit(limit int)	set query execution memory limit in MB for current session. 0 will disable any query memory limit.	call sys.setmemorylimit(500);
sys.setoptimizer(optimizer string)	change optimizer pipeline for current session	call sys.setoptimizer('minimal_pipe');
sys.setprinttimeout(timeout int)	Print long running queries every so many minutes to log file for current session. 0 will disable print timeout.	call sys.setprinttimeout(6);
sys.setquerytimeout(timeout int)	set query execution timeout in seconds for current session. 0 will disable timing out.	call sys.setquerytimeout(8);
sys.setsessiontimeout(timeout int)	set session timeout in seconds for current session. 0 will disable timing out.	call sys.setsessiontimeout(30);
sys.setworkerlimit(limit int)	set number of worker threads limit for current session. 0 will disable any limit of worker threads.	call sys.setworkerlimit(16);
sys.setsession(timeout bigint)	set session timeout in seconds for current session. Warning: This procedure is Deprecated as of Jun2020 (11.37.7). Use sys.setsessiontimeout(timeout) instead.	call sys.setsession(30);
sys.settimeout(querytimeout bigint)	set query timeout in seconds for current session. Warning: This procedure is Deprecated as of Jun2020 (11.37.7). Use sys.setquerytimeout(timeout) instead.	call sys.settimeout(8);
sys.settimeout(querytimeout bigint, sessiontimeout bigint)	set query and session timeout in seconds for current session. Warning: This procedure is Deprecated as of Jun2020 (11.37.7). Use sys.setquerytimeout(timeout) and sys.setsessiontimeout(timeout) instead.	call sys.settimeout(8, 30);

Session procedures for monetdb admin user only

To list all sessions info in your MonetDB server first run query: SELECT * FROM sys.sessions;

Procedure	Description	Example
sys.setmemorylimit(sessionid int, limit int)	set query execution memory limit in MB for specified session. 0 will disable any memory limit.	call sys.setmemorylimit(4, 500);
sys.setoptimizer(sessionid int, optimizer string)	change optimizer pipeline for specified session	call sys.setoptimizer(4, 'sequential_pipe');
sys.setquerytimeout(sessionid int, timeout int)	set query execution timeout in seconds for specified session. 0 will disable timing out.	call sys.setquerytimeout(4, 8);
sys.setsessiontimeout(sessionid int, timeout int)	set session timeout in seconds for specified session. 0 will disable timing out.	call sys.setsessiontimeout(4, 30);
sys.setworkerlimit(sessionid int, limit int)	set number of worker threads limit for specified session. 0 will disable any limit of worker threads.	call sys.setworkerlimit(4, 16);