How to start a pre 1.17 forge server with more ram

[Sitric]

So as the title implies, i'm running a minecraft server on 1.16.5 with mods. as i added a few more mods i need to allocate more ram to it, problem is, i don't know how to start the server now. Normally i'd start it through cmd specifying it to open the .jar with a specific java version. but now that i'd need to run the server from a .bat file i don't know how to deal with it anymore. Could anyone please help me with this? 
Thanks in advance and sorry if this was asked before, i tried googling it before asking but didn't find much.

[Sitric]

turns out my problem might not be related to the memory allocated. Should i open a new thread with the crash report or should i keep posting in this one?

[Sitric]

I think I made it? https://gist.github.com/Sitric16/3c01485e71d9928ae63c67b463d85f59
 

[Sitric]

G:\jdk11\jdk-11\bin\java.exe -jar forge-1.16.5-36.2.18.jar -Xmx8192M -Xms3072M -jar forge-1.16.5-36.2.18.jar 

i think i can already spot part of the problem. i put the -jar twice... ok that was stupid of me. 

where should i put the -jar server.jar part?

[Sitric]

so like this? 

G:\jdk11\jdk-11\bin\java.exe -Xmx8192M -Xms3072M -jar forge-1.16.5-36.2.18.jar

Sorry english isn't my first language so I might have misunderstood you

[Sitric]

nvm i got it working it just didn't seem to want to start from the first double click. Hope it won't give me another crash

[Sitric]

ok it works. Thanks a lot for the help!

[Sitric]

and i got another crash after the server started... 

[Sitric]

Ok I updated the debug log file on github with the new thing. I hope this is the last thing I have to fix