Hello

Since few months i try to upgrade MongoDB from 2.4 to 2.6 and I have problems.

I have tried some 2.6 versions

• Load average problem
• Lock increase ( < 3% in 2.4 and > 10% in 2.6 )
• The connections are not closed
  In Mongo 2.4 everything work fine

My Configuration :
3 servers in ReplicaSet

OS: Debian Wheezy 64bit
Data size: 26GB

I have tried to upgrade one server or the 3 servers in the same time
For the upgrade, i'm using :
https://docs.mongodb.org/manual/release-notes/2.6-upgrade/

I can't find any information in logs.

Configuration used for 2.6 upgrade :

dbpath=/home/data/db/
logpath=/var/log/mongodb/mongodb.log
logappend=true
port = 10001
cpu = true
replSet = replset

The configuration does not change between upgrades
Servers have the necessary resource (No swap, ...)
We tried to upgrade the drivers for applications that connect to MongoDB but there is no change.

Do you have an idea ?