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# Sort by memsize from first 50 lines of dump (can be just with `cat` command)
head -50 input.json | jq --slurp '[.[] | {address: .address, type: .type, file: .file, line: .line, method: .method, memsize: .memsize }] | sort_by(.memsize) | map([.address, .type, .file, "\(.line)", .method, "\(.memsize)"] | join(" ")) | reverse' | head -20
# Group objects by type-class-struct-name, count them, count sum of their memsize and sort them by count
# Useful when you didn't trace allocations
cat input_file | jq --slurp '[.[] | {type: "\(.type) \(.class) \(.struct) \(.name)", memsize: .memsize}] | group_by(.type) | map(reduce .[] as $item ({type: .[0].type, memsize: .[0].memsize, count: 0}; {type: .type, memsize: (.memsize + $item.memsize), count: (.count + 1)})) | sort_by(.count) | map(["\(.count)", "\(.memsize)", .type] | join(" : ")) | reverse' > output_file
# Group objects by allocation file-line, count them and their sum of memsize and sort by memsize
cat input_file | jq --slurp '[.[] | {address: .address, type:
View Why you should upgrade Celluloid ASAP to 0.17.2 (or downgrade to 0.16.0).md

Long story short, Celluloid versions 0.17+ have a memory leak.

The Reason behind this is that completed Celluloid threads are never cleaned up.

We have discovered that our Sidekiq process is leaking memory when we have a lot of tasks that were failed because of exceptions. Unfortunately, having a lot of failed tasks is specific for our application — we do have a lot of small queued jobs to work with social network APIs and other external services.

You can reproduce the problem with this:


If run this with ruby test.rb with MRI, Jruby, and in MRI irb: true

If run in Jruby irb: false

I think it can be related in following failing rails tests, but I'm not sure:

  3) Error:
NoMethodError: private method `foo=' called for #<#<Class:0x64ea9235>:0x6af12899>
View Errors in rails tests
3:activesupport:[master ✗]$ bundle exec rake test --trace
uri:classloader:/jruby/kernel/kernel.rb:28: warning: unsupported exec option: close_others
** Invoke test (first_time)
** Execute test
/Users/alex/code/opensource/jruby/bin/jruby -w -I"lib:test" --dev -I"/Users/alex/.gem/jruby/2.2.2/gems/rake-10.4.2/lib" "/Users/alex/.gem/jruby/2.2.2/gems/rake-10.4.2/lib/rake/rake_test_loader.rb" "test/**/*_test.rb"
/Users/alex/.gem/jruby/2.2.2/gems/minitest-5.3.3/lib/minitest.rb:46: warning: (...) interpreted as grouped expression
uri:classloader:/jruby/bigdecimal.rb:1: warning: loading in progress, circular require considered harmful - bigdecimal.jar
require at org/jruby/
View another_strange_behavior
0:activesupport:[no_fork_issue]$ jruby -v
jruby (2.2.2) 2015-04-21 891f12e Java HotSpot(TM) 64-Bit Server VM 25.31-b07 on 1.8.0_31-b13 +jit [darwin-x86_64]
0:activesupport:[no_fork_issue]$ irb
irb(main):001:0> IO.popen({'PATH' => 'some'}, 'echo $PATH').read
=> "some\n"
[ERROR] Failed to disable echo Cannot run program "sh": error=2, No such file or directory
at java.lang.ProcessBuilder.start(
at java.lang.Runtime.exec(
at java.lang.Runtime.exec(
View output
0:activesupport:[no_fork_issue]$ jruby -v
jruby (2.2.2) 2015-04-21 891f12e Java HotSpot(TM) 64-Bit Server VM 25.31-b07 on 1.8.0_31-b13 +jit [darwin-x86_64]
0:activesupport:[no_fork_issue]$ jruby -S gem install bundler
you might need to reinstall the gem which depends on the missing jar or in case there is Jars.lock then JARS_RESOLVE=true will install the missing jars
no such file to load -- org/yaml/snakeyaml/1.14/snakeyaml-1.14 (LoadError)
do_require at /Users/alex/.rubies/jruby-
require_jar at /Users/alex/.rubies/jruby-
View reproduction_steps.rb
require 'libxml'
require 'nokogiri'
loop do
nodes = Nokogiri::HTML::DocumentFragment.parse 'z<', 'utf-8'
node = nodes.children.first
node.replace node.content
View build
androidbuilder@aa3718480a89:~/android-haskell-activity$ arm-linux-androideabi-cabal build --verbose=3
Using internal setup method with build-type Simple and args:
View gist:d9a71cc79ea5d56f35cc
androidbuilder@cf12994d95a0:~/foreign-jni$ arm-linux-androideabi-cabal install
Resolving dependencies...
Downloading text-
Downloading transformers-
Configuring text-
Configuring transformers-
Failed to install text-
Build log ( /home/androidbuilder/.ghc/android-14/arm-linux-androideabi-4.8/.cabal/logs/text- ):
[1 of 1] Compiling Main ( /tmp/text-, /tmp/text- )
Linking /tmp/text- ...


Gazay's incomplete Minimalistic Language.

By Alexey Gaziev.


Smallest and incomplete language for big but simple config files. It should be so simple that you can write fast parser for it in few LOC and without heavy dependencies.

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