Hi James, Just out of curiosity, does JVM for Tomcat runs on PASE or as native in OS/400?
Regards, Daniel On Fri, Apr 1, 2016 at 6:49 AM James H. H. Lampert <jam...@touchtonecorp.com> wrote: > On 3/31/16, 2:30 PM, Christopher Schultz wrote: > > > Wild Googling has produced this page: > > http://www.texas400.com/b400tip16.html > > > > ...which claims that priority *30* is the same as "interactive". > > > > Something tells me that it's going to come down to a matter of opinion > > what exact priority should be used. But OS processes should probably > > get higher priority than daemons, Tomcat included. > > I've been dealing with IBM Midrange Systems for close to 22 years, and > up until today, I'd never heard of "texas400.com" or David Mount. > > I'm still waiting for a response from the Midrange.com gurus on a > succinct, to-the-point, straight-from-the-equine-masticatory-orifice > document on normal job priorities, but I can tell you, we've never > futzed with them on our production box, and here's an annotated sample > from a WRKACTJOB screen: > > Subsystem/Job Type Pool Pty > > QBASE SBS 2 0 This is a subsystem. > > AUTHSERVER BCH 2 50 This is part of a simple web service. > > CATALINA BCH 2 50 This is the CATALINA job for Tomcat. > > JAMESL00 INT 3 20 This is my terminal session. > > POWERMON2 BCH 2 50 This job checks for power outages. > > QJVACMDSRV BCI 2 50 This is the JVM for AUTHSERVER. > > QP0ZSPWT BCI 2 6 This is the JVM for CATALINA (Tomcat). > > QSYSSCD BCH 3 20 > > THINSERVER BCH 2 50 These are a couple of non-Java servers, > > WTCPCHILD BCH 2 50 both of them running as batch jobs. > > QHTTPSVR SBS 2 0 Another subsystem. > > ADMIN BCI 2 25 This is the system's admin web server. > > QSYSWRK SBS 2 0 Another subsystem. > > CRTPFRDTA BCH 2 50 Some misc. system batch jobs. > > QGLDPUBA ASJ 2 50 > > QGLDPUBE ASJ 2 50 > > QHTTP BCH 2 10 > > QJOBLOGSVR BCH 2 40 > > QJVACMDSRV BCI 2 50 More JVMs > > QJVAEXEC BCI 2 50 > > QMSF BCH 2 35 > > QSQSRVR PJ 2 20 These are system jobs for SQL access. > > QSQSRVR PJ 2 1 Note that the priorities vary. > > QSQSRVR PJ 2 10 > > QSQSRVR PJ 2 10 > > QSQSRVR PJ 2 10 > > The general rule-of-thumb based on what I've seen is that subsystems > always run at 0, batch jobs tend to run at 50, interactive jobs tend to > run at 20, and jobs that are initiated by the operating system can vary > over a wide range. > > FWIW, IBM handles timesharing rather differently from the way most other > manufacturers handle it: terminals, terminal controllers, and terminal > emulators are expected to handle individual keystrokes without any CPU > attention whatsoever, and jobs only get CPU timeslices when there is > processing to be done. And so timeslices tend to be measured in full > seconds (but end immediately as soon as it's necessary to wait for user > interaction). > > -- > JHHL > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
