https://www.pistack.xyz/tags/connection-pool/ Recent content in Connection-Pool on Pi Stack Hugo en-us Mon, 31 Aug 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-08-31-java-connection-pools-hikaricp-commons-dbcp-tomcat-jdbc/ Mon, 31 Aug 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-08-31-java-connection-pools-hikaricp-commons-dbcp-tomcat-jdbc/ <p>A single misconfigured connection pool can turn a 5-millisecond database query into a 40-second pileup under load. Every Java application that touches a relational database eventually needs one, and the choice between HikariCP, Apache Commons DBCP 2, and Tomcat JDBC is one of the most consequential decisions you can make for your application&rsquo;s latency curve — yet most teams pick whichever pool their framework happens to bundle. This guide compares all three pools with live GitHub data, real configuration examples, and the performance trade-offs you will actually feel in production.</p>