James,
On 3/13/26 4:32 PM, James H. H. Lampert via users wrote:
On 3/13/26 12:32 PM, Christopher Schultz wrote:
. . .
I *am* very curious whether this priority is taking effect, as it's
looking for an OS string that begins with "OS400". If you run "uname"
at your command prompt, what does it print? IIRC, you were running
Tomcat inside of a Linux VM because "it was easier" or something like
that. If that's the case, than the OS400-related stuff won't be
running at all.
. . .
Dear Christopher:
Thanks for visiting my humble thread. Your knowledge of Tomcat is always
welcome (especially given that you've saved my E.asinus more than once).
That said, . . .
Uh, "uname" is not a native command in whatever IBM is calling OS/400
these days. If you were to type it on a native command line, you'd get
an error message, "Command UNAME in library *LIBL not found." on your
status line. (Note that the native file system is actually a DB2
database, and object names are not case-sensitive.)
This isn't surprising at all.
If you start a QShell session, which is a *nix-like shell environment
where Java runs (but definitely not an actual Linux VM), and you type
uname, you get "OS400."
Okay, so if you launch Tomcat from a QShell session, then it *will* be
using that OS400-specific code in the shell script, and applying that
priority level...
But then both the change-in-priority and the JVM launch will happen in
that same shell. So what happens when you set the priority of a process
in this way through QShell? Does it give you an absolute priority (e.g.
0 - 100 maps directly to 0 - 100 system priority), or a relative one
(e.g. 0 - 100 maps to [current process priority + requested priority],
or something else?
And no, a Linux VM would not be easier. Short of setting up some sort of
Linux LPAR on the box, I couldn't imagine how one would even do that.
What I did to make it easier was to create a CL program (like a shell
script for IBM Midrange boxes, except that CL programs are compiled)
that looks for the most compatible JVM, sets parameters accordingly,
then launches Tomcat. And another one that attempts to initiate a
shutdown, waits for the job to go away, and if it fails to do so, abends
it.
Okay, forget the Linux VM thing, then. I think maybe I was remembering
you using QShell to get a POSIX-style shell.
-chris
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
