While planning for holiday shopper traffic, we realized that we did not record the number of active sessions at any given time during holiday 2013. To come up with something that would get us close, we wrote what is below…
Month: August 2014
Wrong permissions on /tmp cause havoc with java
We had a server that had been behaving oddly since at least April. I finally discovered why. jps returns nothing, which is the first symptom. When we strace, we see it can’t write to /tmp (our setting for java.io.tmpdir), so…
The PL/SQL commit “optimization”
For those of you that may not know, PL/SQL has what is normally an enhancement that results in a full commit being performed at the end of a job, rather than when the programmer instructs it do so. The reason…
HAProxy ACL based on percentage
We use F5 in production environments, but to test a functional setup of A/B testing, we used HAProxy 1.5-dev21. We have a single domain, and would like to forward requests to one of two backends based on a cookie value.…