Data loss when max-cache-memory-size exceeded?

When we see max-cache-memory-size exceeded errors in our influxdb logs, does this mean that there are data points actually being dropped, and never written to influxdb?
Using influxdb 1.4.

Hello @Dyanne_Ostlind,
Welcome!
Can you please share the exact error you’re getting?
If it’s this error:
https://docs.influxdata.com/influxdb/v1.8/troubleshooting/errors/#write-failed-for-shard---engine-cache-maximum-memory-size-exceeded
They’re not being written.

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So, if we are sending data to influxdb via telegraf, are those data points literally lost, or does telegraf cache them?
Thanks

Hello @Dyanne_Ostlind,
Telegraf caches metrics:
https://docs.influxdata.com/telegraf/v1.20/administration/configuration/#agent-configuration