We created a diskgroup with normal redundancy, and were wasting half the space on the mirror as a result. We are completely striped and mirrored in EMC, so a mirror buys us no additional protection. We wanted to recreate the…
Month: December 2013
Gathering information from HotSpot garbage collection logs
What is below is a useful script to print actionable information from garbage collection logs. As shown by the CMS output below, this is built for the CMS collector. Anything with initial-mark or remark in the output is a “stop…
Is “Connection refused” always a network issue?
We are trained to think that if we see “java.net.ConnectException: Connection refused”, we need to talk to our friends in networking. However, below is at least one example where this is not the case. Create a very simple socket server…