Disable NLS to improve performance

[daignault]

One of our contractors here believes that if NLS is disabled, we could see upward of a 30% performance improvement. I'm not sure how to test it.

We have a performance system and I can set NLS to 0 in uvconfig, but I still have every directory containing the ".NLS" flag. I also have disabled it in only the UniVerse side, not in XMETA.

I'm thinking this will make a very unstable system but I'm willing to give it a shot. At the very least I think we would need to export every project, create new projects under a disabled NLS environment and re-import everything. I suspect re-compilation of everything will also be required.

Anyone ever tried this before?

Ray D

[ray.wurlod]

Disabling NLS won't really affect performance. The fact that NLS is installed means that characters are processed using multi-byte-capable techniques.

Installing without NLS is a "pure (extended) ASCII" environment, single-byte character set only. That would perform better than with NLS installed, but lose you the NLS capabilities. Though I'd not be arrogant enough to suggest a figure of 30% (or any other) - can you ask for an authoritative source for this figure and let us know?

If you have been using NLS, and set maps and/or locales in job designs, then disable NLS, expect lots of warnings about maps and/or locales not being loaded.

[SURA]

I tried before and didn't helped. In other way after you change the settings from either 0 to 1 or wise-verse will create warning about NLS.

[chulett]

As noted, you have to install without NLS to derive any benefit from not doing the 'mult-byte capable processing' that Ray mentions. Disabling it doesn't help.

[robinbrown8636@hotmail.co]

IBM posts that disabling NLS for SERVER jobs can have an impact for performance. No performance gains for parralel jobs

[ray.wurlod]

Welcome aboard. Can you please provide a URL for where "IBM posts" this information?

[cppwiz]

IBM notes this issue with server job performance on the installation screen.

"This installation will be configured for English. If you want to handle data in non-English languages, install globalization support.

If you previously installed IBM InfoSphere DataStage and did not enable national language support, consider installing globalization now so that your system can handle non-English data. Some server jobs might run more slowly after you install globalization. The performance of parallel jobs is not affected.

Important: You cannot change this option after installation"

[ray.wurlod]

No, IBM posts that installing NLS (globalization) may result in slightly degraded performance.

This is true irrespective of the setting of NLSMODE in the uvconfig file.