I have this in batch and the code works without start /low. While compressing with wzzip the CPU is 100% and all other programs hang.

So to fix this issue I've been trying to either set affinity or priority, but with start /low inserted I continue to get error:

Windows cannot find '-ez'

Any help with this would be appreciated.

for /f "tokens=*" %%a in ('type "%Path%\dirlist.txt"') do (
start /low "c:\program files\winzip\wzzip" -ez -md "%%a.zipx" "%%a"

Thanks for the feedback. With it I was able to make it run in priority low.

start "" /b /low /wait "c:\program files\winzip\wzzip.exe" -ez -md "%%~a.zipx" "%%~a"

It was very important to use /wait command otherwise if you are using a for loop the program wzzip.exe runs all instances at once instead of running one then waiting for it to complete before running another.

Additionally, I changed the cpu core usage to 1 by using /affinity 0x1

start "" /b /low /affinity 0x1 /wait "c:\program files\winzip\wzzip.exe" -ez -md "%%~a.zipx" "%%~a"

Thanks for all the help.


1 Answer 1

@echo off 

set "_wzzip="c:\program files\winzip\wzzip.exe"
for /f tokens^=* %%a in ('type "d:\Folder\Subfolder\dirlist.txt"
')do start "" /b /low /wait /affinity 0x1 "!_wzzip!" -ez -md "%%~a.zipx" "%%~a" && (
"%__APPDIR__%wbem\wmic.exe" process where 'name="wzzip.exe"' CALL setpriority "idle")

About: Windows cannot find -ez, try to add "" and .exe in:

start "" /b /wait /low /affinity 0x1 "!_wzzip!" -ez -md "%%~a.zipx" "%%~a" 

You can replace the %path% variable with the full file dirlist.txt:

for /f tokens^=* %%a in ('type "%path%\dirlist.txt"')

for /f tokens^=* %%a in ('type "d:\Folder\Subfolder\dirlist.txt"')

Start your command by adding pertinent arguments/flags so that it starts in the background:

start "" /b /wait /low /affinity 0x1 "!_wzzip!" -ez -md "%%~a.zipx" "%%~a" 

After running the command above in background, make a call to the wmic console setting the wzzip.exe process to idle

"%__APPDIR__%wbem\wmic.exe" process where 'name=wzzip.exe"' CALL setpriority "idle"

[√] Find

[√] Conditional Execution || && ...

[√] wmic in Microsoft Documents /online

[√] wmic setpriority "idle" sources from @Bobs questio and answer


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