Another tool for monitoring the performance and health of a MongoDB node is mongostat. You’ll recall that mongotop shows the time in milliseconds that a mongo node spent accessing (read and write) a particular collection. mongostat on the other hand provides more detailed information about the state of a mongo node, including disk usage, data throughput, index misses, locks, etc. However, the data is general to the mongo node and doesn’t indicate which database or collection the status refers to. As you would expect, both utilities, mongotop and mongostat, are required to get......
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In the process of tuning the performance of a MongoDB replica set, it’s useful to be able to observe mongod directly, as opposed to inferring what it’s doing by watching the output of top, for example. For that reason MongoDB comes with a utility, mongotop. The output of mongotop indicates the amount of time the mongod process spend reading and writing to a specific collection during the update interval. I used the following command to run mongotop on an authentication enabled replica set with a two second interval. [watrous@d1t0156g ~]# mongotop -p -u......
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