Re: QShell performance

Diego,

hostname took about 15 seconds. java -version took about 50 seconds.

-mark

On 6/19/2017 2:44 AM, Diego Kesselman wrote:

Mark,

have you checked your DNS entries?
Do you have an entry on your host table to equals your DNS hostname and FQDN?
If you run "java -version" and "hostname" on QSHELL, how long do they take?

Regards

Diego E. KESSELMAN

El 19/06/2017 a las 01:07 a. m., Niels Liisberg escribió:

Some times if you have journals on the IFS we also experience bad
performance. However if you keep directories smal it is not a problem.


On Mon, Jun 19, 2017 at 7:37 AM Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>
wrote:

Mark,

Something isn't right here -- 25 seconds to run a "mv" command? It
should be sub-second. Is your subsystem low on resources?

Your second example, with the "ls" might be slow if it's a very big
directory. That one is not a good way to do things... but. the first
one shouldn't be too bad. The biggest performance issue, as I see it,
is calling "basename" since that will launch a whole new job each time
you run it.

But, even with that, I don't get why it'd take 25 seconds.

--
Scott Klement
http://www.scottklement.com


On 6/18/17 4:07 PM, mlazarus wrote:

I am attempting to do renames in an IFS folder using a wildcard
pattern. The native IFS commands to not seem to allow wildcards, so I
adapted this from a tip published by Ted Holt.

The code is:
QSH CMD('cd /usr/Mark/Downloads/;for file in *.n37;do mv "$file"
"$(basename $file n37)h37";done')

It was taking a long time, so I pared it down to this statement as a
test:

QSH CMD('cd /usr/Mark/Downloads/;for file in *.h37;do ls
"$file";done') from the command line.

There are 54 entries out of 56 (plus . and ..) that match the
pattern. It took over 1/2 minute to display the first entry. The
entire run took about 14.5 minutes. So it's averaging 25-26 seconds
per entry. This is on a lightly utilized v7r3 Power8, that is quite
fast for most other operations.

1) Can someone explain what it's doing for it to take so long?

2) I assume there's a much better alternative. I'm looking for ideas
to do this with a minimal amount of code.

TIA.

-mark

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