Configuration
Memory Limits
Auto-restart processes that exceed a memory threshold.
pm3 can monitor a process's memory usage and automatically restart it if it exceeds a configured limit. This is useful as a safety net against memory leaks.
Configuration
[worker]
command = "node worker.js"
max_memory = "512M"Type: string
Supported Formats
| Format | Example | Bytes |
|---|---|---|
| Plain bytes | "1048576" | 1,048,576 |
| Kilobytes | "512K" or "512KB" | 524,288 |
| Megabytes | "512M" or "512MB" | 536,870,912 |
| Gigabytes | "1G" or "1GB" | 1,073,741,824 |
Fractional values are supported: "1.5G" = 1.5 gigabytes.
Suffixes are case-insensitive: "200m" is the same as "200M".
Behavior
| Parameter | Value |
|---|---|
| Check interval | 5 seconds |
| Stats poll interval | 2 seconds |
| Measurement | RSS (Resident Set Size) |
When a process exceeds the memory limit:
- pm3 sends the configured
kill_signal(default:SIGTERM). - Waits up to
kill_timeout(default: 5000ms). - Sends
SIGKILLif the process hasn't exited. - Runs the
post_stophook (if configured). - Respawns the process.
Memory monitoring is supported on macOS, Linux, and Windows.
Example
[api]
command = "node server.js"
max_memory = "1G"
restart = "always"
[worker]
command = "python worker.py"
max_memory = "256M"
max_restarts = 50