35.2.2 追踪格式
A span represents an operation within a trace. For more information, see OpenTelemetry Span. The following span types are emitted by the telemetry component:
Issued when the telemetry configuration changes, notifying downstream system of which signal collection has been enabled or disabled.
This span type has the following attributes:
-
Name: Control
-
trace_enabled
: Boolean. -
metrics_enabled
: Boolean. -
logs_enabled
: Boolean -
details
:
Issued when a client session ends, recording data relevant to that session from initial connection to close of session.
This span type has the following attributes:
-
Name: Session
-
mysql.processlist_id
-
mysql.thread_id
-
mysql.user
-
mysql.host
-
mysql.group
This span also contains dynamic attributes generated with the format mysql.session_attr.
, where xxx
is the session connect attribute name. See xxx
session_connect_attrs
.
For example, after the following session disconnects:
mysql> select * from session_connect_attrs;
+----------------+-----------------+------------+------------------+
| PROCESSLIST_ID | ATTR_NAME | ATTR_VALUE | ORDINAL_POSITION |
+----------------+-----------------+------------+------------------+
| 10 | _pid | 14488 | 0 |
| 10 | _platform | x86_64 | 1 |
| 10 | _os | Linux | 2 |
| 10 | _client_name | libmysql | 3 |
| 10 | os_user | malff | 4 |
| 10 | _client_version | 8.4.0-tr | 5 |
| 10 | program_name | mysql | 6 |
+----------------+-----------------+------------+------------------+
7 rows in set (0.00 sec)
The session span emitted is:
Span #
Trace ID : 4137db42febad2d00a4123286076ba18
Parent ID :
ID : b7ff26660b9fcb35
Name : session
Kind : Internal
Start time : 2023-01-11 10:58:24.79557649 +0000 UTC
End time : 2023-01-11 11:00:50.46695685 +0000 UTC
Status code : Unset
Status message :
Attributes:
-> mysql.processlist_id: Int(10)
-> mysql.thread_id: Int(50)
-> mysql.user: Str(root)
-> mysql.host: Str(localhost)
-> mysql.group: Str(USR_default)
-> mysql.session_attr._pid: Str(14488)
-> mysql.session_attr._platform: Str(x86_64)
-> mysql.session_attr._os: Str(Linux)
-> mysql.session_attr._client_name: Str(libmysql)
-> mysql.session_attr.os_user: Str(malff)
-> mysql.session_attr._client_version: Str(8.4.0-tr)
-> mysql.session_attr.program_name: Str(mysql)
Issued when a statement execution ends in the server, recording all relevant statement information from the start of the execution to its completion.
This span type has the following attributes:
-
Name: stmt
-
mysql.event_name
-
mysql.lock_time
-
mysql.sql_text
-
mysql.digest_text
-
mysql.current_schema
-
mysql.object_type
-
mysql.object_schema
-
mysql.object_name
-
mysql.sql_errno
-
mysql.sqlstate
-
mysql.message_text
-
mysql.error_count
-
mysql.warning_count
-
mysql.rows_affected
-
mysql.rows_sent
-
mysql.rows_examined
-
mysql.created_tmp_disk_tables
-
mysql.created_tmp_tables
-
mysql.select_full_join
-
mysql.select_full_range_join
-
mysql.select_range
-
mysql.select_range_check
-
mysql.select_scan
-
mysql.sort_merge_passes
-
mysql.sort_range
-
mysql.sort_rows
-
mysql.sort_scan
-
mysql.no_index_used
-
mysql.no_good_index_used
-
mysql.max_controlled_memory
-
mysql.max_total_memory
-
mysql.cpu_time