DDS Metrics

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

**Table 1** DDS metrics
Metric ID	Metrics Name	Description	Value Range	Monitored Object	Monitoring Interval (Raw Data)
mongo001_command_ps	COMMAND Statements per Second	Number of COMMAND statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Read replica of a DDS replica set instance Primary node Secondary node Hidden nodes of a DDS instance	1 minute 5 seconds
mongo002_delete_ps	DELETE Statements per Second	Number of DELETE statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Primary node Secondary node	1 minute 5 seconds
mongo003_insert_ps	INSERT Statements per Second	Number of INSERT statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Primary node Secondary node	1 minute 5 seconds
mongo004_query_ps	QUERY Statements per Second	Number of QUERY statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Primary node Secondary node	1 minute 5 seconds
mongo005_update_ps	UPDATE Statements per Second	Number of UPDATE statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Primary node Secondary node	1 minute 5 seconds
mongo006_getmore_ps	GETMORE Statements per Second	Number of GETMORE statements executed per second	≥ 0 Count/s	DDS DB instance mongos node Primary node Secondary node	1 minute 5 seconds
mongo007_chunk_num1	Chunks of Shard 1	Number of chunks in shard 1	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num2	Chunks of Shard 2	Number of chunks in shard 2	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num3	Chunks of Shard 3	Number of chunks in shard 3	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num4	Chunks of Shard 4	Number of chunks in shard 4	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num5	Chunks of Shard 5	Number of chunks in shard 5	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num6	Chunks of Shard 6	Number of chunks in shard 6	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num7	Chunks of Shard 7	Number of chunks in shard 7	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num8	Chunks of Shard 8	Number of chunks in shard 8	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num9	Chunks of Shard 9	Number of chunks in shard 9	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num10	Chunks of Shard 10	Number of chunks in shard 10	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num11	Chunks of Shard 11	Number of chunks in shard 11	0–64 Counts	DDS instance	1 minute
mongo007_chunk_num12	Chunks of Shard 12	Number of chunks in shard 12	0–64 Counts	DDS instance	1 minute
mongo008_connections	Active Instance Connections	Total number of connections attempting to connect to a DDS DB instance	0–200 Counts	DDS DB instance	1 minute
mongo009_migFail_num	Chunk Migration Failures in Last 24 hrs	Number of chunk migration failures in the last 24 hours	≥ 0 Counts	DDS DB instance	1 minute
mongo007_connections	Active Node Connections	Total number of connections attempting to connect to a DDS DB instance node	0–200 Counts	mongos node Primary node Secondary node	1 minute 5 seconds
mongo007_connections_usage	Percentage of Active Node Connections	Percentage of the number of connections that attempt to connect to the instance node to the total number of available connections	0~100%	mongos node Primary node Secondary node	1 minute 5 seconds
mongo008_mem_resident	Resident Memory	Size of resident memory in MB	≥ 0 MB	mongos node Primary node Secondary node	1 minute
mongo009_mem_virtual	Virtual Memory	Size of virtual memory in MB	≥ 0 MB	mongos node Primary node Secondary node	1 minute
mongo010_regular_asserts_ps	Regular Asserts per Second	Number of regular asserts per second	≥ 0 Count/s	mongos node Primary node Secondary node	1 minute
mongo011_warning_asserts_ps	Warning Asserts per Second	Number of warning asserts per second	≥ 0 Count/s	mongos node Primary node Secondary node	1 minute
mongo012_msg_asserts_ps	Message Asserts per Second	Number of message asserts per second	≥ 0 Count/s	mongos node Primary node Secondary node	1 minute
mongo013_user_asserts_ps	User Asserts per Second	Number of user asserts per second	≥ 0 Count/s	mongos node Primary node Secondary node	1 minute
mongo014_queues_total	Operations Queued Waiting for a Lock	Number of operations queued waiting for a lock	≥ 0 Counts	Primary node Secondary node	1 minute
mongo015_queues_readers	Operations Queued Waiting for a Read Lock	Number of operations queued waiting for a read lock	≥ 0 Counts	Primary node Secondary node	1 minute
mongo016_queues_writers	Operations Queued Waiting for a Write Lock	Number of operations queued waiting for a write lock	≥ 0 Counts	Primary node Secondary node	1 minute
mongo017_page_faults	Page Faults	Number of page faults on the monitored nodes	≥ 0 Counts	Primary node Secondary node	1 minute
mongo018_porfling_num	Slow Queries	Number of slow queries on the monitored nodes	≥ 0 Counts	Primary node Secondary node	5 minutes
mongo019_cursors_open	Maintained Cursors	Number of maintained cursors on the monitored nodes	≥ 0 Counts	Primary node Secondary node	1 minute
mongo020_cursors_timeOut	Timeout Cursors	Number of timed out cursors on the monitored nodes	≥ 0 Counts	Primary node Secondary node	1 minute
mongo021_wt_cahe_usage	Bytes in WiredTiger Cache	Size of data in the WiredTiger cache in MB	≥ 0 MB	Primary node Secondary node	1 minute
mongo022_wt_cahe_dirty	Tracked Dirty Bytes in WiredTiger Cache	Size of tracked dirty data in the WiredTiger cache in MB	≥ 0 MB	Primary node Secondary node	1 minute
mongo023_wInto_wtCache	Bytes Written Into Cache per Second	Bytes written into WiredTiger cache per second	≥ 0 bytes/s	Primary node Secondary node	1 minute
mongo024_wFrom_wtCache	Bytes Written From Cache per Second	Bytes written from the WiredTiger cache to the disk per second	≥ 0 bytes/s	Primary node Secondary node	1 minute
mongo025_repl_oplog_win	Oplog Window	Available time in hour in the monitored primary node's oplog	≥ 0 Hours	Primary node	1 minute
mongo026_oplog_size_ph	Oplog Growth Rate	Speed in MB/hour at which oplogs are generated on the monitored primary node	≥ 0 MB/Hour	Primary node	1 minute
mongo025_repl_headroom	Replication Headroom	Time difference in seconds between the primary's oplog window and the replication lag of the secondary	≥ 0 Seconds	Secondary node	1 minute
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	Secondary node	1 minute
mongo027_repl_command_ps	Replicated COMMAND Statements per Second	Number of replicated COMMAND statements executed on the secondary node per second	≥ 0 Count/s	Secondary node	1 minute
mongo028_repl_update_ps	Replicated UPDATE Statements per Second	Number of replicated UPDATE statements executed on the secondary node per second	≥ 0 Count/s	Secondary node	1 minute
mongo029_repl_delete_ps	Replicated DELETE Statements per Second	Number of replicated DELETE statements executed on the secondary node per second	≥ 0 Count/s	Secondary node	1 minute
mongo030_repl_insert_ps	Replicated INSERT Statements per Second	Number of replicated INSERT statements executed on the secondary node per second	≥ 0 Count/s	Secondary node	1 minute
mongo031_cpu_usage	CPU Usage	CPU usage of the monitored object	0–1	mongos node Primary node Secondary node	1 minute 5 seconds
mongo032_mem_usage	Memory Usage	Memory usage of the monitored object	0–1	mongos node Primary node Secondary node	1 minute 5 seconds
mongo033_bytes_out	Network Output Throughput	Outgoing traffic in bytes per second	≥ 0 bytes/s	mongos node Primary node Secondary node	1 minute 5 seconds
mongo034_bytes_in	Network Input Throughput	Incoming traffic in bytes per second	≥ 0 bytes/s	mongos node Primary node Secondary node	1 minute 5 seconds
mongo035_disk_usage	Storage Space Usage	Storage space usage of the monitored object	0–1	Primary node Secondary node	1 minute
mongo036_iops	IOPS	Average number of I/O requests processed by the system in a specified period	≥ 0 Count/s	Primary node Secondary node	1 minute
mongo037_read_throughput	Disk Read Throughput	Number of bytes read from the disk per second	≥ 0 bytes/s	Primary node Secondary node	1 minute
mongo038_write_throughput	Disk Write Throughput	Number of bytes written into the disk per second	≥ 0 bytes/s	Primary node Secondary node	1 minute
mongo039_avg_disk_sec_per_read	Average Time per Disk Read	Average time required for each disk read in a specified period	≥ 0 Seconds	Primary node Secondary node	1 minute
mongo040_avg_disk_sec_per_write	Average Time per Disk Write	Average time required for each disk write in a specified period	≥ 0 Seconds	Primary node Secondary node	1 minute
mongo042_disk_total_size	Total Storage Space	Total storage space of the monitored object	0–1000 GB	Primary node Secondary node	1 minute
mongo043_disk_used_size	Used Storage Space	Used storage space of the monitored object	0–1000 GB	Primary node Secondary node	1 minute
mongo044_swap_usage	SWAP Usage	Swap usage, in percentage.	0–1	mongos node Secondary node	1 minute
mongo050_top_total_time	Total Time Spent on Collections	Mongotop-total time: total time spent on collection operations, in milliseconds.	≥ 0 Milliseconds	Primary node Secondary node	1 minute
mongo051_top_read_time	Total Time Spent on Collections	Mongotop-read time: total time spent reading collections, in milliseconds.	≥ 0 Milliseconds	Primary node Secondary node	1 minute
mongo052_top_write_time	Total Time Spent on Collections	Mongotop-write time: total time spent writing collections, in milliseconds.	≥ 0 Milliseconds	Primary node Secondary node	1 minute
mongo053_wt_flushes_status	Number of Times that Checkpoints Are Triggered	Number of times that the checkpoint is triggered during a polling interval of WiredTiger	≥ 0 Counts	Primary node Secondary node	1 minute
mongo054_wt_cache_used_percent	Percentage of the Cache Used by WiredTiger	Cache size used by WiredTiger, in percentage	0–1	Primary node Secondary node	1 minute
mongo055_wt_cache_dirty_percent	Percentage of Dirty Data in the WiredTiger Cache	Dirty size in the WiredTiger cache, in percentage	0–1	Primary node Secondary node	1 minute
mongo070_rocks_active_memtable	Memtable Data Size	Size of data in the active memtable	0~100 GB	Primary node Secondary node	1 minute
mongo071_rocks_oplogcf_active_memtable	Memtable Data Size on Oplogcf	Size of data in the active memtable on oplogcf	0~100 GB	Primary node Secondary node	1 minute
mongo072_rocks_all_memtable	Total Data Size of Memtable and Immutable-memtable	Total data size of memtable and immutable-memtable	0~100 GB	Primary node Secondary node	1 minute
mongo073_rocks_oplogcf_all_memtable	Total Data Size of Memtable and Immutable-memtable on Oplogcf	Total data size of memtable and immutable-memtable on oplogcf	0~100 GB	Primary node Secondary node	1 minute
mongo074_rocks_snapshots	Unreleased Snapshots	Number of unreleased snapshots	≥ 0 Counts	Primary node Secondary node	1 minute
mongo075_rocks_oplogcf_snapshots	Unreleased Snapshots on Oplogcf	Number of unreleased snapshots on oplogcf	≥ 0 Counts	Primary node Secondary node	1 minute
mongo076_rocks_live_versions	Active Versions	Number of active versions	≥ 0 Counts	Primary node Secondary node	1 minute
mongo077_rocks_oplogcf_live_versions	Active Versions on Oplogcf	Number of active versions on oplogcf	≥ 0 Counts	Primary node Secondary node	1 minute
mongo078_rocks_block_cache	Data Size in Blockcache	Size of data in blockcache	0~100 GB	Primary node Secondary node	1 minute
mongo079_rocks_background_errors	Accumulated Background Errors	Accumulated number of background errors	≥ 0 Counts	Primary node Secondary node	1 minute
mongo080_rocks_oplogcf_background_errors	Accumulated Background Errors on Oplogcf	Number of accumulated background errors on oplogcf	≥ 0 Counts	Primary node Secondary node	1 minute
mongo081_rocks_conflict_bytes_usage	Buffer Usage for Processing Transaction Write Conflicts	Usage of the buffer for processing transaction write conflicts	0–1	Primary node Secondary node	1 minute
mongo082_rocks_uncommitted_keys	Uncommitted Keys	Number of uncommitted keys	≥ 0 Counts	Primary node Secondary node	1 minute
mongo083_rocks_committed_keys	Committed Keys	Number of committed keys	≥ 0 Counts	Primary node Secondary node	1 minute
mongo084_rocks_alive_txn	Length of Active Transaction Linked Lists	Length of active transaction linked lists	≥ 0 Counts	Primary node Secondary node	1 minute
mongo085_rocks_read_queue	Length of Read Queues	Length of read queues	≥ 0 Counts	Primary node Secondary node	1 minute
mongo086_rocks_commit_queue	Length of Committed Queues	Length of committed queues	≥ 0 Counts	Primary node Secondary node	1 minute
mongo087_rocks_ct_write_out	Used Concurrent Write Transactions	Number of used concurrent write transactions	≥ 0 Counts	Primary node Secondary node	1 minute
mongo088_rocks_ct_write_available	Available Concurrent Write Transactions	Number of available concurrent write transactions	≥ 0 Counts	Primary node Secondary node	1 minute
mongo089_rocks_ct_read_out	Used Concurrent Read Transactions	Number of used concurrent read transactions	≥ 0 Counts	Primary node Secondary node	1 minute
mongo090_rocks_ct_read_available	Available Concurrent Read Transactions	Number of available concurrent read transactions	≥ 0 Counts	Primary node Secondary node	1 minute
mongo091_active_session_count	Active Sessions	Number of active sessions cached in the memory of the Mongo instance since the last refresh	≥ 0 Counts	DDS DB instance Read replica of a DDS replica set instance Primary node Secondary node Hidden nodes of a DDS instance	1 minute

Metrics whose IDs contain rocks are used to monitor instances or instance nodes of version 4.2.

Dimensions

Key	Value
mongodb_instance_id	DDS DB instance ID
mongos_instance_id	mongos node ID
mongodb_primary_instance_id	Primary node ID
mongodb_secondary_instance_id	Secondary node ID

mongodb_instance_id is used to specify dimension fields when the Cloud Eye API is invoked. Replica sets and single node instance types do not have instance-level metrics.

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