Sidekiq is not faster than Resque

I changed my background job from Resque to Sidekiq, but i was suprise that, it was not currently faster anymore.

I found a possible problem: databse access: my jobs where accessing database.

i have 20 sidekiq worker.

I put  a pool_size for the database of 22 (1 web worker, 1 rake console, 20 workers .. in my yml) and also 22 database connections in mongD. It solved the problem. What takes before 1 hours take less than afterwards 10 minutes.

mongo.yml:

staging:

  adapter: mongodb

  database: database_name

  host: localhost

  port: 27017

  options:

    pool_size: 22

$ cat /etc/mongodb.conf |grep max

maxConns=1000

It may not be the more efficient settings, but I didn't have enougt time to tune them!