How to check the logsize setup for my session and how to change the log size? DMSLOGSIZE options

[SASuserlot]

I am running a macro with lot of do loops. Because of this my log size is increased.  while I am running my code, I am getting pop up asking for save/print/ clear log options. How I can avoid this. From the SAS Manual I came to know default is 99,999 and max can be increased to 999,999 using DMSLOGSIZE options.   

I used OPTIONS DMSLOGSIZE= MAX before running any code. but I am getting the following error. I am using SAS 9.4 / widows. My SAS configurations are set by default ( Auto configuration, Macros and templates are available when I open SAS Session)

WARNING 30-12: SAS option DMSLOGSIZE is valid only at startup of the SAS System. The SAS option is ignored.

I would like to see the log while my code running.  How to increase logsize in my case. Is there a way where I can see  what is my logsize set up  number.

FYI : For temporary I am using proc printto log procedure or batch run ( if I don't have errors in code) or suppressing the Notes.

[SASJedi · Accepted solution]

DMSLOGSIZE is only valid as an invocation option. Increasing the log size can result in sluggish performance for the SAS Windowing Environment (DMS). I always used PROC PRINTTO instead, as you indicate you've been doing already. This is a good compromise solution. For quicker access to the log, you can keep the alternate log file open in Notepad++ (for multiple submissions, it will ask you to refresh each time the log file changes) and ALT-TAB between SAS DMS and Notepad++ to review the results. Notepad++ does a nice job of handling larger text files.

If you really want to change DMSLOGSIZE, you can edit your SASV9.cfg file to set the option to your desired size.

May the SAS be with you!
Mark

[SASuserlot]

Thank you @SASJedi .  I have notepad ++ but I never used this purpose. I will make good use of it now onwards.