Hey,
I’m struggling the something similar in a fresh install of 2.0.4 (dpkg) on Ubuntu 18.04.4 LTS. I have loaded some simple data into influx (a small subset of data from earlier influx install that has worked fine.) Currently no queries, no new data is written, no telegram services, etc.
Influxdb starts. Ramps up memory use. Reaches around 1.7/1.8 of the 2 gigs available. Then it remains there for a minute or two and crashes. Restarts. Cycle repeats 5-10 times every hour.
I tried adding GOGC=20 to sudo systemctl edit --full influxdb.service. But no change.
Update 30th April: Did clean install to version 2.0.6. Wrote minuscule amount of data. Size of /var/lib/influxdb/engine/data is 5 megabyte. Influxdb is using 30 % of memory, as reported by htop, without running any queries. This must be excessively large, even taking into account any overhead needed.