Updated on 2022-02-22 GMT+08:00

DDS Metrics

Function

This section describes metrics reported by Document Database Service (DDS) to Cloud Eye as well as their namespaces and dimensions. You can use APIs provided by Cloud Eye to query the metrics of the monitored object and alarms generated for DDS.

Namespace

SYS.DDS

Monitoring Metrics

Metrics

Metrics Name

Description

Value Range

Remarks

mongo001_command_ps

COMMAND Statements per Second

Number of COMMAND statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo002_delete_ps

DELETE Statements per Second

Number of DELETE statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo003_insert_ps

INSERT Statements per Second

Number of INSERT statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo004_query_ps

QUERY Statements per Second

Number of QUERY statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo005_update_ps

UPDATE Statements per Second

Number of UPDATE statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo006_getmore_ps

GETMORE Statements per Second

Number of GETMORE statements executed per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • Cluster instance
  • mongos node
  • Primary node
  • Secondary node

mongo007_chunk_num1

Chunks of Shard 1

Number of chunks in shard 1

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num2

Chunks of Shard 2

Number of chunks in shard 2

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num3

Chunks of Shard 3

Number of chunks in shard 3

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num4

Chunks of Shard 4

Number of chunks in shard 4

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num5

Chunks of Shard 5

Number of chunks in shard 5

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num6

Chunks of Shard 6

Number of chunks in shard 6

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num7

Chunks of Shard 7

Number of chunks in shard 7

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num8

Chunks of Shard 8

Number of chunks in shard 8

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num9

Chunks of Shard 9

Number of chunks in shard 9

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num10

Chunks of Shard 10

Number of chunks in shard 10

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num11

Chunks of Shard 11

Number of chunks in shard 11

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_chunk_num12

Chunks of Shard 12

Number of chunks in shard 12

0–64 Counts

Monitored object: database

Monitored object type: cluster instance

mongo008_connections

Active Instance Connections

Total number of connections attempting to connect to a DDS DB instance

≥ 0 Counts

Monitored object: database

Monitored object type: cluster instance

mongo009_migFail_num

Chunk Migration Failures in Last 24 hrs

Number of chunk migration failures in the last 24 hours

≥ 0 Counts

Monitored object: database

Monitored object type: cluster instance

mongo007_connections

Active Node Connections

Total number of connections attempting to connect to a DDS DB instance node

0–200 Counts

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo008_mem_resident

Resident Memory

Size of resident memory in MB

≥ 0 MB

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo009_mem_virtual

Virtual Memory

Size of virtual memory in MB

≥ 0 MB

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo010_regular_asserts_ps

Regular Asserts per Second

Number of regular asserts per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo011_warning_asserts_ps

Warning Asserts per Second

Number of warning asserts per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo012_msg_asserts_ps

Message Asserts per Second

Number of message asserts per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo013_user_asserts_ps

User Asserts per Second

Number of user asserts per second

≥ 0 Count/s

Monitored object: database

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo014_queues_total

Operations Queued Waiting for a Lock

Number of operations queued waiting for a lock

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo015_queues_readers

Operations Queued Waiting for a Read Lock

Number of operations queued waiting for a read lock

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo016_queues_writers

Operations Queued Waiting for a Write Lock

Number of operations queued waiting for a write lock

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo017_page_faults

Page Faults

Number of page faults on the monitored nodes

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo018_porfling_num

Slow Queries

Number of slow queries on the monitored nodes

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo019_cursors_open

Current Maintained Cursors

Number of maintained cursors on the monitored nodes

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo020_cursors_timeOut

Timeout Cursors

Number of timed out cursors on the monitored nodes

≥ 0 Counts

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo021_wt_cahe_usage

Bytes in WiredTiger Cache

Size of data in the WiredTiger cache in MB

≥ 0 MB

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo022_wt_cahe_dirty

Tracked Dirty Bytes in WiredTiger Cache

Size of tracked dirty data in the WiredTiger cache in MB

≥ 0 MB

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo023_wInto_wtCache

Bytes Written Into Cache per Second

Bytes written into WiredTiger cache per second

≥ 0 bytes/s

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo024_wFrom_wtCache

Bytes Written From Cache per Second

Bytes written from the WiredTiger cache to the disk per second

≥ 0 bytes/s

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo025_repl_oplog_win

Oplog Window

Available time in hour in the monitored primary node's oplog

≥ 0 Hours

Monitored object: database

Monitored object type: primary node

mongo026_oplog_size_ph

Oplog Growth Rate

Speed in MB/hour at which oplogs are generated on the monitored primary node

≥ 0 MB/Hour

Monitored object: database

Monitored object type: primary node

mongo025_repl_headroom

Replication Headroom

Time difference in seconds between the primary's oplog window and the replication lag of the secondary

≥ 0 Seconds

Monitored object: database

Monitored object type: secondary node

mongo026_repl_lag

Replication Lag

A delay in seconds between an operation on the primary and the application of that operation from the oplog to the secondary

≥ 0 Seconds

Monitored object: database

Monitored object type: secondary node

mongo027_repl_command_ps

Replicated COMMAND Statements per Second

Number of replicated COMMAND statements executed on the secondary node per second

≥ 0 Count/s

Monitored object: database

Monitored object type: secondary node

mongo028_repl_update_ps

Replicated UPDATE Statements per Second

Number of replicated UPDATE statements executed on the secondary node per second

≥ 0 Count/s

Monitored object: database

Monitored object type: secondary node

mongo029_repl_delete_ps

Replicated DELETE Statements per Second

Number of replicated DELETE statements executed on the secondary node per second

≥ 0 Count/s

Monitored object: database

Monitored object type: secondary node

mongo030_repl_insert_ps

Replicated INSERT Statements per Second

Number of replicated INSERT statements executed on the secondary node per second

≥ 0 Count/s

Monitored object: database

Monitored object type: secondary node

mongo031_cpu_usage

CPU Usage

CPU usage of the monitored object

0–1

Monitored object: ECS

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo032_mem_usage

Memory Usage

Memory usage of the monitored object

0–1

Monitored object: ECS

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo033_bytes_out

Network Output Throughput

Outgoing traffic in bytes per second

≥ 0 bytes/s

Monitored object: ECS

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo034_bytes_in

Network Input Throughput

Incoming traffic in bytes per second

≥ 0 bytes/s

Monitored object: ECS

Monitored object type:

  • mongos node
  • Primary node
  • Secondary node

mongo035_disk_usage

Disk Utilization

Disk usage of the monitored object

0–1

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo036_iops

IOPS

Average number of I/O requests processed by the system in a specified period

≥ 0 Count/s

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo037_read_throughput

Disk Read Throughput

Number of bytes read from the disk per second

≥ 0 bytes/s

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo038_write_throughput

Disk Write Throughput

Number of bytes written into the disk per second

≥ 0 bytes/s

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo039_avg_disk_sec_per_read

Disk Read Time

Average time required for each disk read in a specified period

≥ 0 Seconds

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo040_avg_disk_sec_per_write

Disk Write Time

Average time required for each disk write in a specified period

≥ 0 Seconds

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo042_disk_total_size

Total Storage Space

Total storage space of the monitored object

0–1000 GB

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo043_disk_used_size

Used Storage Space

Used storage space of the monitored object

0–1000 GB

Monitored object: ECS

Monitored object type:

  • Primary node
  • Secondary node

mongo044_swap_usage

SWAP Usage

Swap usage, in percentage

0~100%

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo050_top_total_time

Total Time Spent on Collections

Mongotop-total time: total time spent on collection operations, in milliseconds.

0.001~600000.00 ms

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo051_top_read_time

Total Time Spent Reading Collections

Mongotop-read time: total time spent reading collections, in milliseconds.

0.001~600000.00 ms

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo052_top_write_time

Total Time Spent Writing Collections

Mongotop-write time: total time spent writing collections, in milliseconds.

0.001~600000.00 ms

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo053_wt_flushes_status

Number of Times that Checkpoints Are Triggered

Number of times that WiredTiger checkpoints are triggered during a polling interval

0~10000000 Times

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo054_wt_cache_used_percent

Percentage of the Cache Used by WiredTiger

Cache size used by WiredTiger, in percentage

0~100%

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

mongo055_wt_cache_dirty_percent

Percentage of Dirty Data in the WiredTiger Cache

Dirty size in the WiredTiger cache, in percentage

0~100%

Monitored object: database

Monitored object type:

  • Primary node
  • Secondary node

Dimensions

Key

Value

mongodb_cluster_id

DDS DB instance ID

Supports cluster and replica set instances.

mongos_instance_id

mongos node ID

mongod_primary_instance_id

Primary node ID

Includes the primary config and shard nodes of cluster instances and the primary nodes of replica set instances.

mongod_secondary_instance_id

Secondary node ID

Includes the secondary config and shard nodes of cluster instances and the secondary nodes of replica set instances.