Under PHP 5.6 on CentOS 7 we were getting PHP transaction times around 300ms. After upgrading to PHP 7.1, the transaction times jumped to over 800ms. Also, the throughput numbers dropped to single digits (after being in triple digits). Subjectively, in a browser, the site seems fairly responsive, but the jump in transaction time, drop in reported throughput, and corresponding drop in apdex score are worrying.
Using NR daemon version 18.104.22.168-51143810a9c6
Does the agent (or daemon) need to be updated? Anything that we should configure differently? The PHP configurations between 5.6 and 7.1 are matched as closely as possible.