I would actually advocate not controlling the number of running tasks, but instead to simply fire off tasks on demand.
The exception to this is tasks known a priori to cause the system to slow down, perhaps some data warehousing / data mining processes. However, I also believe that activities such as warehousing and mining should not happen on production transaction processing databases, but rather on copies of production transaction processing databases. -- Bhaskar Greg Woodhouse wrote: > Wait...instead of focusing on details (like the use of %RCR), why not > ask a more basic question: What can be done to optimize Taskman. > Bhaskar has raised this issue a number of times, saying that the > current architecture is far from optimal on GT.M (and probably Caché, > too). I agree that just using JOB would be more efficient than the > current approach of maintaining a pool of submanagers. But how is it > possible to maintain the currwent interface. Well, one possibility > would be to have a routine that would serve as the Taskman *prelude*, > something like: > > PRELUDE ; > code to initialize the environment and > set a Taskman specific error trap (so errors > can be logged and handled in Taskman) > > D @routine > > cleanup code goes here > > Q > > So far, so good, but what about controlling the number of running > tasks? A natural approach would be to use a counting semaphore, > initialized to the task limit. Each new task would execute a DOWN on > entry, and UP upon exit (normal or abnormal). As you know, DOWN on a > semaphore with a count of 0 blocks until another process executes an > UP. > > I don't know what support is built into GT.M, but semaphores are > certainly supported by Linux (or any modern Unix). > > > === > Gregory Woodhouse <[EMAIL PROTECTED]> > > "Judge a man by his questions not his answers." > --Voltaire > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > <http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642> > _______________________________________________ > Hardhats-members mailing list > Hardhats-members@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/hardhats-members > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Hardhats-members mailing list Hardhats-members@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hardhats-members
