Differences in Instance Configuration Items in 7.5 Documentation

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Original topic: 7.5文档 instance 配置项差异

| username: ShawnYan

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The following parameters lack documentation explanation?

ddl_slow_threshold
plugin_dir
plugin_load
tidb_check_mb4_value_in_utf8
tidb_expensive_txn_time_threshold
tidb_general_log
tidb_pprof_sql_cpu
tidb_rc_read_check_ts
tidb_service_scope

mysql> select version();
+--------------------+
| version()          |
+--------------------+
| 8.0.11-TiDB-v7.5.0 |
+--------------------+
1 row in set (0.01 sec)

mysql> select * from information_schema.cluster_config where `key` like 'instance.%';
+------+-------------------+----------------------------------------------+---------------------+
| TYPE | INSTANCE          | KEY                                          | VALUE               |
+------+-------------------+----------------------------------------------+---------------------+
| tidb | 192.168.8.92:4000 | instance.ddl_slow_threshold                  | 300                 |
| tidb | 192.168.8.92:4000 | instance.max_connections                     | 0                   |
| tidb | 192.168.8.92:4000 | instance.plugin_dir                          | /data/deploy/plugin |
| tidb | 192.168.8.92:4000 | instance.plugin_load                         |                     |
| tidb | 192.168.8.92:4000 | instance.tidb_check_mb4_value_in_utf8        | true                |
| tidb | 192.168.8.92:4000 | instance.tidb_enable_collect_execution_info  | true                |
| tidb | 192.168.8.92:4000 | instance.tidb_enable_ddl                     | true                |
| tidb | 192.168.8.92:4000 | instance.tidb_enable_slow_log                | true                |
| tidb | 192.168.8.92:4000 | instance.tidb_expensive_query_time_threshold | 60                  |
| tidb | 192.168.8.92:4000 | instance.tidb_expensive_txn_time_threshold   | 600                 |
| tidb | 192.168.8.92:4000 | instance.tidb_force_priority                 | NO_PRIORITY         |
| tidb | 192.168.8.92:4000 | instance.tidb_general_log                    | false               |
| tidb | 192.168.8.92:4000 | instance.tidb_pprof_sql_cpu                  | false               |
| tidb | 192.168.8.92:4000 | instance.tidb_rc_read_check_ts               | false               |
| tidb | 192.168.8.92:4000 | instance.tidb_record_plan_in_slow_log        | 1                   |
| tidb | 192.168.8.92:4000 | instance.tidb_service_scope                  |                     |
| tidb | 192.168.8.92:4000 | instance.tidb_slow_log_threshold             | 300                 |
| tidb | 192.168.8.92:4000 | instance.tidb_stmt_summary_enable_persistent | false               |
| tidb | 192.168.8.92:4000 | instance.tidb_stmt_summary_file_max_backups  | 0                   |
| tidb | 192.168.8.92:4000 | instance.tidb_stmt_summary_file_max_days     | 3                   |
| tidb | 192.168.8.92:4000 | instance.tidb_stmt_summary_file_max_size     | 64                  |
| tidb | 192.168.8.92:4000 | instance.tidb_stmt_summary_filename          | tidb-statements.log |
+------+-------------------+----------------------------------------------+---------------------+
22 rows in set (0.03 sec)
| username: Billmay表妹 | Original post link

Already reported.

| username: Billmay表妹 | Original post link

These documents are all on the system variables page: 系统变量 | PingCAP 文档中心

| username: ShawnYan | Original post link

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