Shulou(Shulou.com)06/01 Report--

Mongodb mms monitor item Opcounters: the current number of actions (command,query,update,delete,gemore,insert) that executed the command Connections: the current number of active connections to this server. Assign a stack per connection Therefore, a very large number of connections can cause serious RAM to use page_faults: page error average interest rate this process during the selected sample period Memory: resident, virtual Map memory size Network: network traffic egress and ingress traffic DB Storage: DB size Scan And Order: cannot perform an operation using an index Document Metrics: returned: average interest rate per second query returned documents in the selected sample inserted: average speed of the document Insert selected sample segment updated per second: the average rate at which files are updated during the selected sample. Deleted: average rate of files deleted during the selected sample period Queues current queue Query Executor scanned: average interest rate per second selected sample segment index items during scan query and query plan evaluation scanned objects Average interest rate per second the selected sample file scanned in the query and query plan evaluation Tickets Available read: indicates the number of parallel read operations allowed into the storage engine. When this value reaches 0, the new read request queue until the ticket reading is available write: the number of concurrent writes representing the number of writes is allowed to enter the storage engine. When this value reaches 0, the new write request queue Query Targeting scanned / returned until the ticket is available: the ratio of the number of index entries to the number of documents returned by the query, because the previous data point is the selected sample period. A value of 1. 0 means that all returned documents fully meet the query criteria scanned objects / returned for the sample period: the ratio of the number of documents scanned against the number of documents returned by the query Because the previous data point is the selected sample period Cursors the current number of cursors Replication Oplog Window approximate number of hours can be used for oplog main replication. If a level 2 real-time exceeds this number and cannot catch up later, you need a complete resynchronization Asserts maintenance window Cache Activity readInto: cache writtenFrom that reads bytes per second at an average rate of WiredTiger during the selected sample period: during the selected sample period Average rate of bytes written per second is WiredTiger cache Operation Execution Times average execution time per read / write / command operation during the selected sample period average speed per hour generated by Oplog GB/Hour oplog: dirty bytes currently being tracked WiredTiger cache used: number of bytes currently in the WiredTiger cache

The above is the explanation of mongodb's official monitoring (mms), all based on self-understanding.

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