Recently we have found some odd issue related to our environment. We have Percona 5.5 running on various virtual machines (all as slaves). All have the same parameters and use the same config file (from central repository). On Xen and VMware the memory usage is constant but on KVM it’s constantly growing up 90%. We have tried to tune it by setting the ‘innodb_dict_size_limit’ but it didn’t help. Any suggestions?