How to speed up IBM WDSC or RDi for faster RPG editing 

 July 9, 2013

By  NickLitten

WDSC7 is the coolest (free) editor for RPG/CL programmers on the IBM i operating system. We know that right? But it’s still annoyingly clunky to use at times, Unless you free it up to use some more memory and let it run free… like a gazelle… even if its a little bit of a parky gazelle…

WDSC Memory Increase

Increase WDSC memory allocation is as simple as this. Edit the configuration file at C:\Program Files\IBM\SDP70\eclipse.ini and increase the XX:MaxPermSize in eclipse.ini from 512M to something bigger… 1024M? 1512M? 2048M? I use 1512M and it works great so make your INI file look like this:

C:\Program Files\IBM\SDP70\jdk\jre\bin\javaw.exe

How to speed up IBM WDSC or RDi for faster RPG editing 1

JULY 2015 Update: I bit the bullet and bought IBM Rational Developer RDi a while ago. It’s a nice step up from the old WDSC client and it deffo runs faster, smoother and supports all the new opcodes that are being introduced to RPG over recent years. I highly recommend RDi to each and every RPG programmer and IBM i Software Developer out there. Having said that – you can also increase the memory usage for RDi to free it up  🙂

RDi Memory Increase

RDi config lives in C:\Program Files\IBM\SDP and you can make the same memory size increase:

C:\Program Files\IBM\SDP\jdk\jre\bin\javaw.exe
C:/Program Files/IBM/SDP



how to install SDA and RLU alternative GUI with WDSCWDSC is a terrific graphical Coding Tool for the IBMi – Best in class of the ‘free as400 coding’ too…Feb 19 2010www.nicklitten.com

How to add the Turnover V100 Perspective to WDSC7OK. So we already agree that using WDSC for IBM i software editing, for free, is pretty cool. But, …Aug 13 2013www.nicklitten.com


IBM i Software Developer, Digital Dad, AS400 Anarchist, RPG Modernizer, Shameless Trekkie, Belligerent Nerd, Englishman Abroad and Passionate Eater of Cheese and Biscuits. Nick Litten Dot Com is a mixture of blog posts that can be sometimes serious, frequently playful and probably down-right pointless all in the space of a day. Enjoy your stay, feel free to comment and remember: If at first you don't succeed then skydiving probably isn't a hobby you should look into.

Nick Litten

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