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linux check process limits

linux check process limits

When a Java app starts throwing “too many open files” in production, this is where I always start. /proc/PID/limits shows you the configured limits, and /proc/PID/fd shows you what files are actually open right now. Comparing the two usually tells you everything you need to know.

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$ /proc/PROCESS_ID/limits


$ /proc/PROCESS_ID/fd 


$ /proc/PROCESS_ID/fd | wc -l
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