feature_memory_monitoring.md

Feature - Memory Monitoring

Measure SDK captures the following to help monitor memory:

1. Memory usage over time
2. Trim memory

Memory usage over time

How it works

A worker thread reads the following properties every 2 seconds and reports them to Measure:

• Max heap size - collected using Runtime.maxMemory.
• Total heap size - collected using Runtime.totalMemory.
• Free heap size - collected using Runtime.freeMemory.
• RSS (Resident set size) - collected by reading the proc/pid/statm file.
• Total PSS (Proportional set size) - collected using Debug.getMemoryInfo.
• Native total heap size - collected using Debug.getNativeHeapSize.
• Native free heap size - collected using Debug.getNativeFreeHeapSize.

Data collected

Checkout all the data collected for memory usage in the Memory Usage Event section.

Trim memory

How it works

Measure tracks all trim memory triggered by the OS, along with the trim level. Trim memory and the level reported can provide clues about memory availability.

Data collected

Checkout all the data collected for trim memory in the Trim Memory Event section.