FAQ: Data throughput¶
By default DSMR-reader reads and preserves all telegram data read.
When using a Raspberry Pi (or similar) combined with a DSMR version 5 smart meter (the default nowadays), you may experience issues after a while.
This is caused by the high data throughput of DSMR version 5, which produces a new telegram every second. Both DSMR-reader and most of its users do not need this high frequency of telegrams to store, calculate and plot consumption data.
Therefor two measures can be taken.
1. Increase the datalogger sleep time¶
Increase the datalogger sleep time in the configuration to 5 seconds or higher. This will save a lot of disk storage, especially when using a Raspberry Pi SD card, usually having a size of 16 GB max.
2. Configure a data retention policy¶
Configure a data retention policy in the configuration. This will eventually delete up to 99 percent of the telegrams, always preserving a few historically. Also, day and hour totals are never deleted by retention policies.
New installations of DSMR-reader
v4.1 or higher will start with a default retention policy of one year.
However, this may not be sufficient in your situation and you can consider using a shorter retention period.