cpu and ram usage increases over time

On a busy server (~20MB/s network traffic, ~7k QPS) the CPU usage and memory footprint (RSS) increased substantially over a five-day period that tcprstat was run. Initial footprint was just a few MB and ~5% of one cpu core. At end of sample period, RSS was ~800MB and CPU% was sustained around 150% (more than one core on an 8-core host). tcprstat v0.3.1.x86_64 was run with the options "-p 3306 -n 0".

A similar increase was noticed on another busy server, whereas only minimal increase was noticed on a non-busy server. All three servers had the same OS, hardware, and sample duration.