OS: Debian 9.8 (stretch)
Version: InfluxDB 1.7.4

Since I updated from 1.7.3 to 1.7.4, I've had runaway memory consumption from the influxdb process, steadily growing to consume all available memory until restarted.  This seems to be new behavior, but I don't see any other threads discussing this.  See annotated screenshot from my system monitoring below. (Restarts free up all locked memory -- the chart doesn't show this because of datapoint decimation.)

Data source is Icinga 2 performance data.

Any similar observations, or pointers on options to debug?

![influx|535x263](upload://el4c1BH8Gj5WEGzLOGe7jjcNwZs.png)

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