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Performance

Database performance monitoring and advisors.

Mongo Stats

A quick overview of the status of running Mongod instances grouped by shard (or replica set) similar to Mongostat command collected every db_stats_collection_interval (configured inside CMON configuration file).

Field Description
Queries
  • The number of query operations per second.
Inserts
  • The number of objects inserted into the database per second. If followed by an asterisk (e.g. *), the datum refers to a replicated operation.
Updates
  • The number of update operations per second.
Deletes
  • The number of delete operations per second.
Command
  • The number of commands per second.
Getmore
  • The number of getting more (i.e. cursor batch) operations per second.
Vsize
  • The amount of virtual memory in megabytes used by the process at the time of the last Mongostat call.
Res
  • The amount of resident memory in megabytes used by the process at the time of the last Mongostat call.
Faults
  • The number of page faults per second.
Locked(%)
  • The percent of the time in a global write lock.
idx miss(%)
  • The percent of index access attempts that required a page fault to load a btree node.
qr|qw
  • qr – The length of the queue of clients waiting to read data from the MongoDB instance.
  • qw – The length of the queue of clients waiting to write data from the MongoDB instance.
ar|aw
  • ar – The number of active clients performing read operations.
  • aw – The number of active clients performing write operations.
NetIn
  • The amount of network traffic, in bytes, received by the MongoDB instance.
NetOut
  • The amount of network traffic, in bytes, sent by the MongoDB instance.
Conn
  • The total number of open connections.
Time
  • The last time ClusterControl fetch for node’s status.

Overview

Provides an overview of database operations by type and makes it possible to analyze the load on the database in a more granular manner.

Field Description
opcounters
  • An aggregated view of all opscounters in a single graph.
opcounters.query
  • Provides a graph of the total number of queries received since the Mongod instance last started.
opcounters.insert
  • Provides a graph of the total number of insert operations received since the Mongod instance last started.
opcounters.update
  • Provides a graph of the total number of update operations received since the Mongod instance last started.
opcounters.delete
  • Provides a graph of the total number of delete operations since the Mongod instance last started.
opcounters.getmore
  • Provides a graph of the total number of “getmore” operations since the Mongod instance last started.
opcounters.getmore
  • Provides a graph of the total number of commands issued to the database since the Mongod instance last started.

Advisors

Lists of scheduled advisors’ results created in ClusterControl → Manage → Developer Studio using ClusterControl DSL. You can think of it as a ‘scheduled mini-program’ which executes a script created in Developer Studio and produces a result containing status, advice, and justification. Each advisor can be expanded and collapsed by clicking on the dropdown icon at the top right corner.

Field Description
Show Advisors
  • Filters the advisor result based on the tag.
Edit
  • Opens the advisor script in Developer Studio.
Disable
  • Disables the advisor script from running.
Status
  • Advisor status – Ok, Warning, Critical.
DB Instance
  • The database server the advisor running on.
Justification
  • The result of advisors’ execution.
Advice
  • The advisor’s decision based on the justification.
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