DCS Metrics

Introduction

This section describes DCS metrics reported to Cloud Eye as well as their namespaces and dimensions. You can use the Cloud Eye console or call APIs to query the DCS metrics and alarms.

Different types of instances are monitored on different dimensions.

**Table 1** Monitoring dimensions for different instance types
Instance Type	Instance Monitoring	Redis Server Monitoring	Proxy Monitoring
Single-node	Supported The monitoring on the instance dimension is conducted on the Redis Server.	N/A	N/A
Master/standby	Supported The master node is monitored.	Supported The master and standby nodes are monitored.	N/A
Read/write splitting	Supported The master node is monitored.	Supported The master and standby nodes are monitored.	Supported Each proxy is monitored.
Proxy Cluster	Supported The monitoring data is the aggregated master node data.	Supported Each shard is monitored.	Supported Each proxy is monitored.
Redis Cluster	Supported The monitoring data is the aggregated master node data.	Supported Each shard is monitored.	N/A

Namespace

SYS.DCS

DCS Redis 4.0/5.0/6.0 Instance Metrics

Dimensions lists the metric dimensions.
The monitoring data is the aggregated master node data.
Some metrics are aggregated from the master and replica nodes. For details, see "Metric Description" in Table 2.

**Table 2** DCS Redis 4.0/5.0/6.0 instance metrics
Metric ID	Metric Name	Metric Description	Value Range	Monitored Object	Monitoring Period (Raw Data)
cpu_usage	CPU Usage	The monitored object's maximum CPU usage among multiple sampling values in a monitoring period Unit: %	0–100%	Single-node, master/standby, or read/write splitting DCS Redis instance	1 minute
cpu_avg_usage	Average CPU Usage	The monitored object's average CPU usage of multiple sampling values in a monitoring period Unit: %	0–100%	Single-node, master/standby, or read/write splitting DCS Redis instance	1 minute
command_max_delay	Maximum Command Latency	Maximum latency of commands Unit: ms	≥ 0 ms	DCS Redis instance	1 minute
total_connections_received	New Connections	Number of connections received during the monitoring period. Includes connections from replicas and established for system monitoring, configuration synchronization, and services	≥ 0	DCS Redis instance	1 minute
is_slow_log_exist	Slow Query Logs	Existence of slow query logs in the instance NOTE: Slow queries caused by the MIGRATE, SLAVEOF, CONFIG, BGSAVE, and BGREWRITEAOF commands are not counted.	1: yes 0: no	DCS Redis instance	1 minute
memory_usage	Memory Usage	Memory consumed by the monitored object Unit: %	0–100%	DCS Redis instance	1 minute
expires	Keys With an Expiration	Number of keys with an expiration in Redis	≥ 0	DCS Redis instance	1 minute
keyspace_hits_perc	Hit Rate	Ratio of the number of Redis cache hits to the number of lookups. Calculation: keyspace_hits/(keyspace_hits + keyspace_misses) Aggregated from the master and replica nodes. If no read command is performed within a monitoring period, the ratio is 0. Unit: %	0–100%	DCS Redis instance	1 minute
used_memory	Used Memory	Total number of bytes used by the Redis server Unit: KB, MB, or byte (configurable on the console)	≥ 0	DCS Redis instance	1 minute
used_memory_dataset	Used Memory Dataset	Dataset memory that the Redis server has used Unit: KB, MB, or byte (configurable on the console)	≥ 0	DCS Redis instance	1 minute
used_memory_dataset_perc	Used Memory Dataset Ratio	Percentage of dataset memory that server has used Aggregated from the master and replica nodes. Unit: %	0–100%	DCS Redis instance	1 minute
used_memory_rss	Used Memory RSS	Resident set size (RSS) memory that the Redis server has used, which is the memory that actually resides in the memory, including all stack and heap memory but not swapped-out memory Unit: KB, MB, or byte (configurable on the console)	≥ 0	DCS Redis instance	1 minute
instantaneous_ops	Ops per Second	Number of commands processed per second	≥ 0	DCS Redis instance	1 minute
keyspace_misses	Keyspace Misses	Number of failed lookups of keys in the main dictionary during the monitoring period Aggregated from the master and replica nodes.	≥ 0	DCS Redis instance	1 minute
keys	Keys	Number of keys in Redis	≥ 0	DCS Redis instance	1 minute
blocked_clients	Blocked Clients	Number of clients suspended by block operations	≥ 0	DCS Redis instance	1 minute
connected_clients	Connected Clients	Number of connected clients. Includes connections established for system monitoring, configuration synchronization, and services. Excludes connections from replicas.	≥ 0	DCS Redis instance	1 minute
del	DEL	Number of DEL commands processed per second	0–500,000	DCS Redis instance	1 minute
evicted_keys	Evicted Keys	Number of keys that have been evicted and deleted during the monitoring period Aggregated from the master and replica nodes.	≥ 0	DCS Redis instance	1 minute
expire	EXPIRE	Number of EXPIRE commands processed per second	0–500,000	DCS Redis instance	1 minute
expired_keys	Expired Keys	Number of keys that have expired and been deleted during the monitoring period Aggregated from the master and replica nodes.	≥ 0	DCS Redis instance	1 minute
get	GET	Number of GET commands processed per second Aggregated from the master and replica nodes. Unit: count/s	0–500,000	DCS Redis instance	1 minute
hdel	HDEL	Number of HDEL commands processed per second	0–500,000	DCS Redis instance	1 minute
hget	HGET	Number of HGET commands processed per second Aggregated from the master and replica nodes. Unit: count/s	0–500,000	DCS Redis instance	1 minute
hmget	HMGET	Number of HMGET commands processed per second Aggregated from the master and replica nodes. Unit: count/s	0–500,000	DCS Redis instance	1 minute
hmset	HMSET	Number of HMSET commands processed per second	0–500,000	DCS Redis instance	1 minute
hset	HSET	Number of HSET commands processed per second	0–500,000	DCS Redis instance	1 minute
instantaneous_input_kbps	Input Flow	Instantaneous input traffic Unit: KB/s	≥ 0 KB/s	DCS Redis instance	1 minute
instantaneous_output_kbps	Output Flow	Instantaneous output traffic Unit: KB/s	≥ 0 KB/s	DCS Redis instance	1 minute
memory_frag_ratio	Memory Fragmentation Ratio	Current memory fragmentation	≥ 0	DCS Redis instance	1 minute
mget	MGET	Number of MGET commands processed per second Aggregated from the master and replica nodes. Unit: count/s	0–500,000	DCS Redis instance	1 minute
mset	MSET	Number of MSET commands processed per second	0–500,000	DCS Redis instance	1 minute
pubsub_channels	PubSub Channels	Number of Pub/Sub channels	≥ 0	DCS Redis instance	1 minute
pubsub_patterns	PubSub Patterns	Number of Pub/Sub patterns	≥ 0	DCS Redis instance	1 minute
set	SET	Number of SET commands processed per second	0–500,000	DCS Redis instance	1 minute
used_memory_lua	Used Memory Lua	Number of bytes used by the Lua engine Unit: KB, MB, or byte (configurable on the console)	≥ 0	DCS Redis instance	1 minute
used_memory_peak	Used Memory Peak	Peak memory consumed by Redis since the Redis server last started Unit: KB, MB, or byte (configurable on the console)	≥ 0	DCS Redis instance	1 minute
sadd	Sadd	Number of SADD commands processed per second Unit: count/s	0–500,000	DCS Redis instance	1 minute
smembers	Smembers	Number of SMEMBERS commands processed per second Aggregated from the master and replica nodes. Unit: count/s	0–500,000	DCS Redis instance	1 minute
scan	SCAN	Number of SCAN operations per second Unit: count/s	0–500,000	DCS Redis instance	1 minute
setex	SETEX	Number of SETEX operations per second Unit: count/s	0–500,000	DCS Redis instance	1 minute
rx_controlled	Flow Control Times	Number of flow control times during the monitoring period If the value is greater than 0, the used bandwidth exceeds the upper limit and flow control is triggered. Unit: Count	≥ 0	DCS Redis instance	1 minute
bandwidth_usage	Bandwidth Usage	Percentage of the used bandwidth to the maximum bandwidth limit	0–200%	DCS Redis instance	1 minute
command_max_rt	Maximum Latency	Maximum delay from when the node receives commands to when it responds Unit: us	≥ 0	Single-node DCS Redis instance	1 minute
command_avg_rt	Average Latency	Average delay from when the node receives commands to when it responds Unit: us	≥ 0	Single-node DCS Redis instance	1 minute

Redis Server Metrics of DCS Redis Instances

These metrics are supported for master/standby, read/write splitting, and cluster instances.
Dimensions lists the metric dimensions.

**Table 3** Redis Server metrics
Metric ID	Metric Name	Metric Description	Value Range	Monitored Object	Monitoring Period (Raw Data)
cpu_usage	CPU Usage	The monitored object's maximum CPU usage among multiple sampling values in a monitoring period Unit: %	0–100%	Redis Server of a master/standby, read/write splitting, or cluster DCS Redis instance	1 minute
cpu_avg_usage	Average CPU Usage	The monitored object's average CPU usage of multiple sampling values in a monitoring period Unit: %	0–100%	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
memory_usage	Memory Usage	Memory consumed by the monitored object Unit: %	0–100%	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
connected_clients	Connected Clients	Number of connected clients. Includes connections established for system monitoring, configuration synchronization, and services. Excludes connections from replicas	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
client_longest_out_list	Client Longest Output List	Longest output list among current client connections	≥ 0	Redis 4.0 Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
client_biggest_in_buf	Client Biggest Input Buf	Maximum input data length among current client connections Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis 4.0 Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
blocked_clients	Blocked Clients	Number of clients suspended by block operations such as BLPOP, BRPOP, and BRPOPLPUSH	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
used_memory	Used Memory	Total number of bytes used by the Redis server Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
used_memory_rss	Used Memory RSS	RSS memory that the Redis server has used, which includes all stack and heap memory but not swapped-out memory Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
used_memory_peak	Used Memory Peak	Peak memory consumed by Redis since the Redis server last started Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
used_memory_lua	Used Memory Lua	Number of bytes used by the Lua engine Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
memory_frag_ratio	Memory Fragmentation Ratio	Current memory fragmentation, which is the ratio between used_memory_rss/used_memory.	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
total_connections_received	New Connections	Number of connections received during the monitoring period. Includes connections from replicas and established for system monitoring, configuration synchronization, and services	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
total_commands_processed	Commands Processed	Number of commands processed during the monitoring period	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
instantaneous_ops	Ops per Second	Number of commands processed per second	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
total_net_input_bytes	Network Input Bytes	Number of bytes received during the monitoring period Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
total_net_output_bytes	Network Output Bytes	Number of bytes sent during the monitoring period Unit: KB, MB, or byte (configurable on the console)	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
instantaneous_input_kbps	Input Flow	Instantaneous input traffic Unit: KB/s	≥ 0 KB/s	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
instantaneous_output_kbps	Output Flow	Instantaneous output traffic Unit: KB/s	≥ 0 KB/s	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
rejected_connections	Rejected Connections	Number of connections that have exceeded maxclients and been rejected during the monitoring period	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
expired_keys	Expired Keys	Number of keys that have expired and been deleted during the monitoring period	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
evicted_keys	Evicted Keys	Number of keys that have been evicted and deleted during the monitoring period	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
pubsub_channels	PubSub Channels	Number of Pub/Sub channels	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
pubsub_patterns	PubSub Patterns	Number of Pub/Sub patterns	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
keyspace_hits_perc	Hit Rate	Ratio of the number of Redis cache hits to the number of lookups. Calculation: keyspace_hits/(keyspace_hits + keyspace_misses) If no read command is performed within a monitoring period, the ratio is 0. Unit: %	0–100%	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
command_max_delay	Maximum Command Latency	Maximum latency of commands Unit: ms	≥ 0 ms	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
is_slow_log_exist	Slow Query Logs	Existence of slow query logs in the node NOTE: Slow queries caused by the MIGRATE, SLAVEOF, CONFIG, BGSAVE, and BGREWRITEAOF commands are not counted.	1: yes 0: no	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
keys	Keys	Number of keys in Redis	≥ 0	Redis Server of a master/standby, read/write splitting or cluster DCS Redis instance	1 minute
sadd	SADD	Number of SADD commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
smembers	SMEMBERS	Number of SMEMBERS commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
ms_repl_offset	Replication Gap	Data synchronization gap between the master and the replica	-	Replica of a master/standby, read/write splitting, or cluster instance	1 minute
del	DEL	Number of DEL commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
expire	EXPIRE	Number of EXPIRE commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
get	GET	Number of GET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
hdel	HDEL	Number of HDEL commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
hget	HGET	Number of HGET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
hmget	HMGET	Number of HMGET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
hmset	HMSET	Number of HMSET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby or cluster instance	1 minute
hset	HSET	Number of HSET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
mget	MGET	Number of MGET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
mset	MSET	Number of MSET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
set	SET	Number of SET commands processed per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
rx_controlled	Flow Control Times	Number of flow control times during the monitoring period If the value is greater than 0, the used bandwidth exceeds the upper limit and flow control is triggered. Unit: Count	≥ 0	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
bandwidth_usage	Bandwidth Usage	Percentage of the used bandwidth to the maximum bandwidth limit	0–200%	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
connections_usage	Connection Usage	Percentage of the current number of connections to the maximum allowed number of connections Unit: %	0–100%	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
command_max_rt	Maximum Latency	Maximum delay from when the node receives commands to when it responds Unit: us	≥ 0	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
command_avg_rt	Average Latency	Average delay from when the node receives commands to when it responds Unit: us	≥ 0	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
sync_full	Full Sync Times	Total number of full synchronizations since the Redis Server last started	≥ 0	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
slow_log_counts	Slow Queries	Number of times that slow queries occur within a monitoring period	≥ 0	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
scan	SCAN	Number of SCAN operations per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute
setex	SETEX	Number of SETEX operations per second Unit: count/s	0–500,000	Redis Server of a master/standby, read/write splitting, or cluster instance	1 minute

Proxy Metrics

These metrics are supported by Proxy Cluster and read/write splitting instances.
Dimensions lists the metric dimensions.

**Table 4** Proxy metrics of Proxy Cluster or read/write splitting DCS Redis 4.0 or 5.0 instances
Metric ID	Metric Name	Metric Description	Value Range	Monitored Object	Monitoring Period (Raw Data)
node_status	Proxy Status	Indication of whether the proxy is normal.	0: Normal 1: Abnormal	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
cpu_usage	CPU Usage	The monitored object's maximum CPU usage among multiple sampling values in a monitoring period Unit: %	0–100%	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
cpu_avg_usage	Average CPU Usage	The monitored object's average CPU usage of multiple sampling values in a monitoring period Unit: %	0–100%	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
memory_usage	Memory Usage	Memory consumed by the monitored object Unit: %	0–100%	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
connected_clients	Connected Clients	Number of connected clients. Includes connections established for system monitoring, configuration synchronization, and services. Excludes connections from replicas	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
instantaneous_ops	Ops per Second	Number of commands processed per second	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
instantaneous_input_kbps	Input Flow	Instantaneous input traffic Unit: KB/s	≥ 0 KB/s	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
instantaneous_output_kbps	Output Flow	Instantaneous output traffic Unit: KB/s	≥ 0 KB/s	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
total_net_input_bytes	Network Input Bytes	Number of bytes received during the monitoring period Unit: KB, MB, or byte (configurable on the console)	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
total_net_output_bytes	Network Output Bytes	Number of bytes sent during the monitoring period Unit: KB, MB, or byte (configurable on the console)	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
connections_usage	Connection Usage	Percentage of the current number of connections to the maximum allowed number of connections Unit: %	0–100%	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
command_max_rt	Maximum Latency	Maximum delay from when the node receives commands to when it responds Unit: us	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute
command_avg_rt	Average Latency	Average delay from when the node receives commands to when it responds Unit: us	≥ 0	Proxy in a Proxy Cluster or read/write splitting instance	1 minute

Dimensions

Key	Value
dcs_instance_id	DCS Redis instance
dcs_cluster_redis_node	Redis Server
dcs_cluster_proxy2_node	Proxy in a Proxy Cluster and read/write splitting DCS Redis 4.0 or later instance