UNIX for Beginners Questions & Answers

Good evening.

because the folder has thousand of files it takes too long and have some trouble to get the largest files and then compress files or delete it, for instance

Code:

find . -size +10000000c -exec ls -ld {} \; |sort -k5n | grep -v .gz

The above commad took an hour and i have to cancel it

Code:

du -sk * | sort -nr | more

secondly The above command took up some much time and got me root: args too long so it filed


Tried to compress some files but it took so long

Code:

nohup gzip log_HistoricoRecargas*201703*.log &

are there more efficient methods or commands to do this because i failed tried with these 3 choices
The operating system is SunOS

I appreciate your help in advanced