user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication Step 5. Monitor the task and view logs To view the history status of the migration task and other internal metrics, take the following steps. If you have deployed Prometheus, Alertmanager, and Grafana when the task and view logs （optional) To view the historical status of the migration task and other internal metrics, take the following steps. If you have deployed Prometheus, Alertmanager, and Grafana when

user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication initialization completed in 421 ms 2023-01-05T14:06:54.916+08:00 INFO 22005 --- [ main] o.hibernate.jpa. �→ internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [ �→ name: default] 2023-01-05T14:06:54 HHH000490: Using JtaPlatform implementation: [ �→ org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform] 2023-01-05T14:06:55.335+08:00 INFO 22005 --- [ main] j. �→ LocalContainerEntityManagerFactoryBean

execution time of DDL is �→ significantly reduced. Especially in scenarios with wide tables, �→ internal test data shows that performance can be improved by up to �→ 94%. Reliability indexes in a single SQL statement is significantly improved. Especially in scenarios with wide tables, internal test data shows that performance can be improved by up to 94%. 2.2.1.3 DB operations • DDL jobs added Controls the duration for which the change- feed is allowed to automat- ically retry when internal errors or excep- tions occur. TiCDC encoding �→ - �→ worker �→ -num Newly added Controls the number

enabled. TiCDC supports handling both Checksum V1 and V2. This change only affects TiDB and TiCDC internal implementation and does not affect checksum calculation methods for downstream Kafka consumers. the system variable tidb_auto_analyze_concurrency #53460 @hawkingrei • Optimize the logic of an internal function to improve performance when querying tables with numerous columns #52112 @Rustin170506 user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication

enabled. TiCDC supports handling both Checksum V1 and V2. This change only affects TiDB and TiCDC internal implementation and does not affect checksum calculation methods for downstream Kafka consumers. the system variable tidb_auto_analyze_concurrency #53460 @hawkingrei • Optimize the logic of an internal function to improve performance when querying tables with numerous columns #52112 @Rustin170506 user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication

tidb_low_resolution is enabled, select for update can be executed #54684 @cfzjywxk • Fix the issue that internal SQL queries cannot be displayed in the slow query log when tidb_redact_log is enabled #54190 @lcwangchao argument is month and the second argument is negative #54908 @xzhangxian1008 • Fix the issue that internal SQL statements in the slow log are redacted to null by default #54190 #52743 #53264 @lcwangchao user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication

user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication table is non-clustered index. In tables with non-clustered indexes, the keys for row data consist of internal _tidb_rowid implicitly assigned by TiDB. Because primary keys are essentially unique indexes, tables Non-clustered index table For non-clustered index tables (also known as “non-index-organized tables”), the internal field _tidb_rowid can be used as a pagination key, and the pagination method is the same as that

performance. A non- transactional DML statement is a DML statement split into multiple SQL statements for internal execution. The split statements compromise transaction atomicity and iso- lation but greatly improve chunk reuse feature that occurs in some cases #38917 @keeplearning20221 • Fix the issue that the internal sessions of tidb_constraint_check_in_place_pessimistic �→ might be affected by the global setting user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication

format· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4624 14.21 Internal Components · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication table is non-clustered index. In tables with non-clustered indexes, the keys for row data consist of internal _tidb_rowid implicitly assigned by TiDB. Because primary keys are essentially unique indexes, tables

user: "tidb": Use the tidb system user (automatically created during deploy- ment) to perform the internal management of the cluster. By default, use port 22 to log in to the target machine via SSH. • replication disabled during backup and restore, compatibility issues might still occur due to the inconsistent internal versions or inconsistent interfaces between BR and TiKV/TiDB/PD. To avoid such cases, BR has the amount of CPU and I/O resources of the cluster, which increases cluster latency. The results of internal tests show that under the default configuration, the backup tasks using BR have a great impact on