MongoDB achieves regular currentOp capture

MongoDB achieves regular currentOp capture

Problem description:

When analyzing performance problems in the production environment, it is often impossible to get started because there is no real-time basis. The author captures db. currentOp () to the file and serves as a scheduled task for subsequent analysis.

Solution:
 
Step 1: Shell script record db. currentOp ()

1. Create a folder

Mkdir currentOp

2. Create currentOp. sh

#! /Bin/sh
MONGO =/usr/bin/mongo
DATE = $ (date + % Y % m % d % H % M)
CURRENTOPFILE =/home/xucy/currentOp/$ DATE
$ MONGO admin-uxucy-pPassw0rd -- eval "rs. slaveOk (); printjson (db. currentOp ();"> $ CURRENTOPFILE 2> & 1
LOCATION =/home/xucy/currentOp/
Find $ LOCATION-mtime + 1-type f | xargs rm-f
 
Step 2: Add a Crontab scheduled task

Crontab-e
*/5 */bin/sh/home/xucy/currentOp. sh>/dev/null 2> & 1

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