Failed to push bit repository on git

I am trying to push existing git repository(100gb size) on gitlab server but while trying to push getting below error:
fatal: Out of memory, realloc failed
fatal: The remote end hung up unexpectedly
fatal: The remote end hung up unexpectedly
fatal: write error: Bad file descriptor
error: failed to push some refs to 'https://git.****.com/root/PsCore.git’

Can someone please help me on this. Also please let me know what should be ideal gitlab server configuation for 100gb of repo.?