Mongostat performance analysis

One 、mongostat Performance analysis

Carry out orders

./mongostat --host 127.0.0.1:27001

Field meaning

Field	explain
insert	Number of objects inserted into the database per second
query	Number of query operations per second
update	Number of update operations per second
delete	Number of delete operations per second
getmore	Per second get more Number of operations ( For example, cursor operation )
command	Number of commands executed per second
dirty	WiredTiger Percentage of dirty data in the cache , exceed 20% Block new requests
used	To divide into mongodb Memory used , How much has been occupied , exceed 80% Start lru Policy clear cache , exceed 95% Block new requests
flushes	Refers to each interval WiredTiger Engine triggered checkpoints Count
vsize	Virtual memory
res	Real memory
qr	Wait for MongoDB The queue length of the instance reading data
qw	Wait for MongoDB The queue length of the data written by the instance
ar	Number of active customers performing read operations
aw	Number of active clients performing write operations
net_in	MongoDB The network traffic received by the instance
net_out	MongoDB The network traffic sent by the instance
conn	The number of connections
set	If there are settings , Here is the replica set name
repl	Roles in the replication set :PRI(primary)/SEC(secondary)/REC(recovering)/UNK(unknown)/RTR(mongos process router)/ARB(arbiter)
time	Time

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