(pronounced onis)
Onis gives you introspection into object counts of live running ruby process.
$ sudo gem install onis
$ cd onis/
$ cat test/stringpwnd.rb
require 'onis'
puts Process.pid
a = []
while true ; a << "foo" ; sleep(0.5) ; end
$ ruby test/stringpwd.rb &
[1] 26584
$ onis
PID COMMAND
------------------------------------------------------------
26584 ruby -I lib/ test/stringpwnd.rb
$ onis -f 26584
Class Count
--------------------------------------------------------
String 3483
Class 156
Array 55
Module 25
Regexp 9
File 8
Hash 7
Float 6
Object 3
...
$ onis -f -c 26584
$ onis -w 26584
# config.ru or Rails metal
map '/onis' do
run Onis::Web
end
- Onis drops a tempfile named after the pid
onis.<pid>
- Onis then traps SIGUSR1
- When SIGUSR1 is sent to a process that
has
require
d Onis, Onis will dump the ObjectSpace and counts to that tempfile.
- handle
fork
- Aman Gupta (tmm1) for inspiration and example
- Ryan Tomayko for playing that great music at Columbus Cafe and telling me to take this one step further
Copyright (c) 2009 Blake Mizerany
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