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Telegraf
Agent for collecting, processing, aggregating, and writing metrics, logs, and other arbitrary data.
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profile-sync-daemon
Symlinks and syncs browser profile dirs to RAM thus reducing HDD/SDD calls and speeding-up browsers.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I'm a big fan of Telegraf for collecting observability data. This link is for the procstat plugin which provides you total bytes and total # ops for both reads and writes.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.