We found Vlad through his blog posts about Hibernate and MySQL performance tuning and insights. We are running a JVM application, which serves around 12k requests/s right now, with the load growing rapidly.
Before moving to MySQL replication or adding caching layers, we wanted to make sure not to have missed any low-hanging fruits regarding Hibernate usage or JDBC/connection pool configuration.
Therefore, we had multiple screen-sharing sessions with Vlad, walking through our application configuration, and also received a written report of his findings.
It was clear very quickly that Vlad is very knowledgeable and experienced. He constantly came up with ideas on what to improve and pointed us to helpful monitoring & management tools.
We left off with the trust that we covered our bases well, and with a better idea on which improvements will pay off by how much.