stefan-mees

select
concat(
 BIT_AND(1054420290, 255)
, concat('.'
, concat(BIT_AND(floor(BIT_OR(1054420290, 255) / 256), 255)
, concat('.'
, BIT_AND(floor(BIT_OR(1054420290, 65535) / 65536), 255)
, concat('.'
, BIT_AND(floor(BIT_OR(1054420290, 16777215) / 16777216), 255)
)))))

stefan-mees

 (for i in `find ./ -type f`; do export version=`head -c 100 $i | strings | awk '/^4\.[0-9]+/'`; echo "$i:$version"; done;) > /tmp/cache_versions.txt

stefan-mees

%% get config at runtime
rpc:call(node(), application, get_all_env, [bitcask]).
%% set config at runtime for a node
rpc:call(node(), application, set_env, [bitcask, merge_window, always]).

%% get config for all nodes in a cluster
rpc:multicall(application, get_all_env, [bitcask]).
%% set config for all nodes in a cluster
rpc:multicall(application, set_env, [bitcask, merge_window, always]).

stefan-mees

require 'socket'
require 'timeout'

while true
  Dir.glob('/home/ubuntu/applications/xx/shared/sockets/*.sock').each do |socket|
    instance = $1 if socket =~ /([^\/]+)\.sock$/
    
    s = nil
    begin
      Timeout.timeout(0.5) do

stefan-mees

AWS.config({
    :access_key_id => 'xxxxx',
    :secret_access_key => 'xxxxx',
})
bucket_name = 'xxxxx'


s3 = AWS::S3.new()
bucket = s3.buckets[bucket_name]

stefan-mees

p `cat /proc/#{Process.pid}/status | grep VmRSS`
"VmRSS:\t   30256 kB\n"

100_000.times {String.public_instance_methods}

GC.start

p `cat /proc/#{Process.pid}/status | grep VmRSS`
"VmRSS:\t  625820 kB\n"

stefan-mees

ruby redis_keys.rb zipmap
redis-cli  info | grep used_memory_human
used_memory_human:18.54M

ruby redis_keys.rb hash
redis-cli  info | grep used_memory_human
used_memory_human:69.92M

ruby redis_keys.rb plain
redis-cli  info | grep used_memory_human