There can be numerous explanations such as your configuration (cache warm queries, merge factor, replication events etc) but also I/O having trouble flushing everything to disk. It could also be a memory problem, the OS might start swapping if you allocate too much RAM to the JVM leaving little for the OS to work with.
You need to provide more details. > After replicating an index of around 20g my slaves experience very high > load (50+!!) > > Is there anything I can do to alleviate this problem? Would solr cloud > be of any help? > > thanks
