High Memory usage
Added by Imran Ali almost 16 years ago
Hey All
I have searched a lot before posting here but haven't found anything substantial yet. We just moved our project website to a new server i.e. a new Slice on Slice Host(256MB). The memory usage stats are enormous i.e. upwards of 35%. It even goes upto 60% at times.
I therefore decided to install the Enterprise edition of Ruby and haven't seen any major improvements. I have passenger installed BTW.
P.S: We were earlier on Site5 and used Fast CGI then. Could this be the reason why we faced absolutely no issues there even though it was a Shared host account?
Replies (7)
RE: High Memory usage - Added by Eric Davis almost 16 years ago
Each Ruby on Rails process tends to use from 35-160MB of memory depending on the libraries used. My Redmine tends to hover between 80-120MB and I have about a dozen plugins installed (106MB and 108MB RSS right now). If you don't use the gnatt chart, turning off RMagick can save a bit of memory (RMagick is known to leak memory). Just comment out the require_library_or_gem 'RMagick'
line in lib/redmine.rb
.
The older version of Ruby Enterprise Edition didn't save any memory on 64-bit systems, in fact I think it used more memory than the vanilla MRI. I'm not sure if this is still the case.
Eric
RE: High Memory usage - Added by Dave Nolan almost 16 years ago
If you're on a 64 bit system, you might want to look at installing a 32 bit chroot. It's not for the faint-hearted though.
http://miloping.com/content/2009/01/3/installing-32-bit-chroot-debian-etch
Dave
RE: High Memory usage - Added by Leandro Lucarella almost 16 years ago
I have a similar problem, but since I upgraded from a pre-0.8.0 svn to latest svn trunk. I had to upgrade to rails 2.2 too, so I don't know if it's Redmine or Rails fault.
The process starts at ~40MB and after about a day, it's using ~120MB. Since I have "only" 256MB I eventually have to restart the Redmine process (running as fastcgi with apache2) or my kernel starts shooting other processes (usually MySQL) to give Redmine more memory.
Should I fill a bug?
RE: High Memory usage - Added by Imran Ali almost 16 years ago
Leandro Lucarella wrote:
I have a similar problem, but since I upgraded from a pre-0.8.0 svn to latest svn trunk. I had to upgrade to rails 2.2 too, so I don't know if it's Redmine or Rails fault.
The process starts at ~40MB and after about a day, it's using ~120MB. Since I have "only" 256MB I eventually have to restart the Redmine process (running as fastcgi with apache2) or my kernel starts shooting other processes (usually MySQL) to give Redmine more memory.
Should I fill a bug?
Sounds exactly like the problem we are facing. It starts to shoot up after some time and then finally becomes uncontrollable.
RE: High Memory usage - Added by Giulio Turetta over 15 years ago
it seems to be a common problem with RoR.... I've same problems also with other RoR applications.
I tried memory profiling, code enchantments, any way... no success.
To use redmine without problems now I use a dedicated server with apache proxy, lighthttpd and fcgi.. it works very well but memory remains a problem on shared (outsourcing) hosting:
www-data 27901 4.0 6.5 60192 48596 ? S 00:34 0:08 ruby /home/giulio/rails/redmine-0.8/public/dispatch.fcgi
note px aux uptime...
I wrote to customer service of my hosting company (very skilled guys - they perform kernel tuning and co.) but we can't find magic solutions... some one suggested to force garbage collector on after filter of application.rb, but I didn't test.
Customer service also suggested another (more elegant) way to force GC:
You can edit dispatch.fcgi to force GC actions
form
RailsFCGIHandler.process!
to
RailsFCGIHandler.process! nil, 10
second argument represented number of request for process before call GC.
Tiny number = aggressive GC (slow down application)
can someone tests this solutions and reports about it?
Maybe it helps!
have a nice day!
RE: High Memory usage - Added by Leandro Lucarella over 15 years ago
I've done a small test (using 5 instead of 10, I have a very low traffic instance so I don't care that much about killing performance a little), and it seems to work (it's using 43MB constantly), but I didn't testing for a long time, so time will tell.
Thanks for sharing this tip!
RE: High Memory usage - Added by Leandro Lucarella over 15 years ago
I been using this trick for 4 days now and even when the memory usage grew to almost 60MB, then the process was cycled by fastcgi so it's everything under control.