Dameng
Dameng collector can collect the running status index from Dameng database instance.
Collector Configuration¶
Go to the conf.d/samples directory under the DataKit installation directory, copy dameng.conf.sample and name it dameng.conf. Examples are as follows:
[[inputs.dameng]]
  # host name
  host = "localhost"
  ## port
  port = 5236
  ## user name
  user = "SYSDBA"
  ## password
  password = "datakit"
  ## database name
  database = "DMTEST"
  ## Slow query threshold in milliseconds, default 1000
  slow_query_threshold = 1000
  ## @param connect_timeout - number - optional - default: 10s
  # connect_timeout = "10s"
  interval = "10s"
  ## Set true to enable election
  election = true
  ## Metric name in metric_exclude_list will not be collected.
  #
  metric_exclude_list = [""]
  ## Run a custom SQL query and collect corresponding metrics.
  #
  # [[inputs.dameng.custom_queries]]
  #   sql = 'SELECT name AS "name", stat_val AS "stat_val" FROM sys.v$sysstat;'
  #   metric = "dameng_custom_query"
  #   tags = ["name"]
  #   fields = ["stat_val"]
  #   interval = "30s"
  ## Log collection
  #
  [inputs.dameng.log]
    # files = []
    # pipeline = "dameng.p"
    ## The pattern should be a regexp. Note the use of '''this regexp'''
    ## regexp link: https://golang.org/pkg/regexp/syntax/#hdr-Syntax
    multiline_match = '''^\\d{4}-\\d{2}-\\d{2}\\s+\\d{2}:\\d{2}:\\d{2}\\s+\\[.*?\\]'''
  [inputs.dameng.tags]
    # some_tag = "some_value"
    # more_tag = "some_other_value"
After configuration, restart DataKit.
The collector can now be turned on by ConfigMap Injection Collector Configuration.
Metric¶
For all of the following data collections, the global election tags will added automatically, we can add extra tags in [inputs.dameng.tags] if needed:
dameng_memory¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| buffer_size_mb | Size of the buffer pool in MB. Type: float | (gauge) Unit: digital,MB  | 
| mem_pool_size_mb | Size of the memory pool in MB. Type: float | (gauge) Unit: digital,MB  | 
| total_size_mb | Total memory size (buffer pool + memory pool) in MB. Type: float | (gauge) Unit: digital,MB  | 
dameng_mem_pool¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| is_overflow ( tag) | 
Whether the memory pool is in overflow state (Y/N) | 
| is_shared ( tag) | 
Whether the memory pool is shared (Y/N) | 
| pool_name ( tag) | 
Name of the memory pool | 
| data_size_mb | Data size in the memory pool in MB. Type: float | (gauge) Unit: digital,MB  | 
| extend_size | Size of extended memory in the pool. Type: int | (gauge) Unit: count  | 
| n_extend_exclusive | Number of exclusive memory extensions. Type: int | (gauge) Unit: count  | 
| n_extend_normal | Number of normal memory extensions. Type: int | (gauge) Unit: count  | 
| org_size_mb | Original size of the memory pool in MB. Type: float | (gauge) Unit: digital,MB  | 
| reserved_size_mb | Reserved size of the memory pool in MB. Type: float | (gauge) Unit: digital,MB  | 
| target_size | Target size of the memory pool. Type: int | (gauge) Unit: count  | 
| total_size_mb | Total size of the memory pool in MB. Type: float | (gauge) Unit: digital,MB  | 
dameng_tablespace¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| tablespace_name ( tag) | 
Name of the table space | 
| free_size_mb | Free size of the table space in MB. Type: float | (gauge) Unit: digital,MB  | 
| max_block_mb | Maximum block size in MB. Type: float | (gauge) Unit: digital,MB  | 
| total_size_mb | Total size of the table space in MB. Type: float | (gauge) Unit: digital,MB  | 
| usage_ratio | Usage ratio of the table space as a percentage. Type: float | (gauge) Unit: percent,percent  | 
| used_size_mb | Used size of the table space in MB. Type: float | (gauge) Unit: digital,MB  | 
dameng_connections¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| active_connections | Number of active connections to the database. Type: int | (gauge) Unit: count  | 
| idle_connections | Number of idle connections in the database. Type: int | (gauge) Unit: count  | 
| max_connections | Maximum number of connections allowed. Type: int | (gauge) Unit: count  | 
dameng_rates¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| qps | Queries per second executed in the database. Type: float | (gauge) Unit: count  | 
| tps | Transactions per second (commits + rollbacks) in the database. Type: float | (gauge) Unit: count  | 
dameng_slow_query¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| sess_id ( tag) | 
Session ID of the slow query | 
| sql_id ( tag) | 
Unique identifier of the slow query | 
| sql_text ( tag) | 
Truncated SQL query text. | 
| exec_time | Execution time of the slow query in milliseconds. Type: int | (gauge) Unit: time,ms  | 
| n_runs | Number of times the slow query has been executed. Type: int | (gauge) Unit: count  | 
dameng_locks¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| waiting_locks | Number of waiting locks in the database. Type: int | (gauge) Unit: count  | 
dameng_deadlock¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| deadlock_sess_id ( tag) | 
Session ID of the deadlock | 
| deadlock_trx_id ( tag) | 
Transaction ID of the deadlock | 
| host ( tag) | 
The server address or the host name | 
| deadlock_count | Number of times the deadlock has occurred. Type: int | (gauge) Unit: count  | 
dameng_buffer_cache¶
| Tags & Fields | Description | 
|---|---|
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| pool_name ( tag) | 
Name of the buffer pool | 
| buffer_hit_ratio | Buffer cache hit ratio as a percentage. Type: float | (gauge) Unit: percent,percent  | 
| total_size_bytes | Total size of the buffer pool in bytes. Type: int | (gauge) Unit: digital,B  | 
| total_size_gb | Total size of the buffer pool in GB. Type: float | (gauge) Unit: digital,GB  | 
dameng_block_sessions¶
| Tags & Fields | Description | 
|---|---|
| blocked_lock_type ( tag) | 
Type of the lock causing the block (e.g., object_lock, transaction_lock) | 
| blocked_sess_id ( tag) | 
Session ID of the blocked session | 
| blocked_start_time ( tag) | 
Start time of the blocked session | 
| blocked_trx_id ( tag) | 
Transaction ID of the blocked session | 
| blocking_ip ( tag) | 
Client IP of the blocking session | 
| blocking_sess_id ( tag) | 
Session ID of the blocking session | 
| blocking_trx_id ( tag) | 
Transaction ID of the blocking session | 
| database ( tag) | 
The name of the database | 
| host ( tag) | 
The server address or the host name | 
| block_duration_min | Duration of the block in minutes. Type: float | (gauge) Unit: time,min  | 
Log Collection¶
- 
During the operation of the Dameng database, some critical information is recorded in log files located in the
logdirectory under the installation directory, with the naming formatdm_<instance name>_YYYYMM.log. For example:dm_DMSERVER_202507.log. - 
The Dameng collector does not have log collection enabled by default. You can open
filesin conf.d/samples/dameng.conf and write to the absolute path of the Dameng log file. For example: 
When log collection is turned on, a log with a log source of dameng is generated by default.
Notices:
- Log collection only supports logs on hosts where DataKit is installed.
 
Log Pipeline Cut¶
The original log is
2025-07-03 10:16:20.659 [INFO] database P0000001485 T0000000000000001485  INI parameter ROLLSEG_POOLS changed, the original value 19, new value 1
Description of the cut field:
| Field name | Field Value | Description | 
|---|---|---|
msg | 
database P0000001485 T0000000000000001485  …… new value 1 | 
Log content | 
status | 
info | 
Current log level (ERROR,FATAL,WARNING,INFO) | 
time | 
1751537780 | 
Log generation time |