Hi all, Ruby 2.1+ allows tracing object allocations, see more details in this article [1].
I enabled it and dumped the Ruby memory usage data in a SLES12-SP2 Beta3 installation. It is related to this Trello card [2] and this bug [3]. You can find more details and the dump in my Gist [4], here is a copy of the most interesting part: ## The Result A quick scan found out that the place which consumes most memory is /usr/share/YaST2/lib/installation/ssh_config_file.rb:45:STRING: count: 4, total size: 274056 which loads the SSH keys and configuration from the previous installation and needs about 270kB memory. The question is we can optimize it better, the SSH keys actually need to be stored somewhere as the target partition will be reformatted... The only optimization could be probably possible when the user selects to not copy the keys. In that case we could drop the loaded keys when the installation starts. But that's not the default so this improvement would actually help only in some cases... ## TODO You can collect a different statistics from the data, e.g. the place which creates the most objects, which methods, check the object "age" (the GC generation value), etc... [1] http://tmm1.net/ruby21-objspace/ [2] https://trello.com/c/QJ2PHxjs [3] https://bugzilla.suse.com/show_bug.cgi?id=974601 [4] https://gist.github.com/lslezak/6b99026b7ea9e163cdfd5a6d6d0aca6c -- Best Regards Ladislav Slezák Yast Developer ------------------------------------------------------------------------ SUSE LINUX, s.r.o. e-mail: [email protected] Lihovarská 1060/12 tel: +420 284 028 960 190 00 Prague 9 fax: +420 284 028 951 Czech Republic http://www.suse.cz/ -- To unsubscribe, e-mail: [email protected] To contact the owner, e-mail: [email protected]
