Drop Series Cause Write Fail/Write Timeouts/High Memory Usage

[ghost]

When dropping series, we see high memory usage causing write fail/timeouts. If drop series across the entire database, influxdb would crash. when restarting influxdb due to the crash, load are still high (hoovering 7-9), a reboot is then required.

influxdb version: v1.3.2
os: redhat 7.3
spec: m4.2xlarge (8 core / 32GB)

screenshot from influxdb "_internal" stats:

[jwilder]

Can you run the following when memory usage is high and attach the output to the issue?

curl -o profiles.tar.gz "http://localhost:8086/debug/pprof/all?cpu=true"

curl -o vars.txt "http://localhost:8086/debug/vars"
iostat -xd 1 30 > iostat.txt

[pingliu]

@jwilder I also have this problem.

write-timeout = "2m" also write timeout when influxdb drop series.

[jwilder]

#8801 should fix this.