The Not-So-Dynamic SGA

Severe performance issues are possible on Solaris for databases that use DISM. Although the most of the support notes have the same root cause (Bug 15794950), there is another problem affecting pre-12c databases that hasn't been well documented.


Solaris Cluster vs Network Speed

While investigating rsync/ssh performance, I discovered that our Solaris Clusters had just over half the expected throughput on their gigabit NICs. This was caused by the cluster/streams related module clhbsndr being automatically pushed to each public NIC via /etc/iu.ap . Symptoms: Round trip time via ping was higher than non-cluster servers on the same network … Continue reading Solaris Cluster vs Network Speed