FAQ - TiDB Forum

Topic	Views	Activity
Why can't some tables be replicated when I create a task in TiCDC? ticdc	473	January 30, 2023
Does TiCDC replication get stuck if the upstream has long-running uncommitted transactions? ticdc	480	January 30, 2023
Replication of a single table can only be run on a single TiCDC node. Will it be possible to use multiple TiCDC nodes to replicate data of multiple tables? ticdc	434	January 30, 2023
What is the order of executing DML and DDL statements? ticdc	499	January 30, 2023
How should I deploy TiCDC to replicate data between two TiDB cluster located in different regions? ticdc	511	January 30, 2023
After a changefeed resumes from pause, its replication latency gets higher and higher and returns to normal only after a few minutes. Why? ticdc	432	January 30, 2023
Why does replication using TiCDC stall or even stop after data restore using TiDB Lightning and BR from upstream? ticdc	296	January 30, 2023
Why does TiCDC use disks? When does TiCDC write to disks? Does TiCDC use memory buffer to improve replication performance? ticdc	304	January 30, 2023
When the sink of the replication downstream is TiDB or MySQL, what permissions do users of the downstream database need? ticdc	318	January 30, 2023
Why do `INSERT`/`UPDATE` statements from the upstream become `REPLACE INTO` after being replicated to the downstream if I set `enable-old-value` to `true` when I create a TiCDC replication task? ticdc	324	January 30, 2023
The default value of the time type field is inconsistent when replicating a DDL statement to the downstream MySQL 5.7. What can I do? ticdc	314	January 30, 2023
How much PD storage does TiCDC use? ticdc	302	January 30, 2023
When TiCDC replicates data to Kafka, how do I know the timestamp of the data changes in a message? ticdc	297	January 30, 2023
When TiCDC replicates data to Kafka, does a message contain multiple types of data changes? ticdc	299	January 30, 2023
If I modify a row multiple times in a transaction, will TiCDC output multiple row change events? ticdc	281	January 30, 2023
How to understand the relationship between the TiCDC time zone and the time zones of the upstream/downstream databases? ticdc	315	January 30, 2023
What is the complete behavior of TiCDC garbage collection (GC) safepoint? ticdc	436	January 30, 2023
How do I choose `start-ts` when creating a task in TiCDC? ticdc	317	January 30, 2023
Why does the load unit report the `Unknown character set` error? dm	315	January 30, 2023
How to handle the returned error when executing start-relay command for DM versions from 2.0.2 to 2.0.6? dm	414	January 30, 2023
Why does the Grafana dashboard of a DM cluster display `failed to fetch dashboard` if the cluster is deployed using TiUP v1.3.0 or v1.3.1? dm	362	January 30, 2023
Why does DM report the error `ERROR 1236 (HY000): The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires.` if it restarts during an incremental task? dm	333	January 30, 2023
In DM v2.0, why does the full import task fail if DM restarts during the task? dm	353	January 30, 2023
Why do `REPLACE` statements keep appearing in the downstream when DM is replicating? dm	316	January 30, 2023
Why do some monitoring panels show `No data point`? dm	274	January 30, 2023
How to handle the error `duplicate entry` when DM is replicating data? dm	328	January 30, 2023
How to handle the error `fail to initial unit Sync of subtask` when DM is starting a task, with the `RawCause` in the error message showing `context deadline exceeded`? dm	306	January 30, 2023
Why does the `replicate lag` monitor metric show no data when DM is not replicating from upstream? dm	291	January 30, 2023
How to handle the error `parse mydumper metadata error: EOF` that occurs when DM is replicating data? dm	303	January 30, 2023
Why does TiUP fail to deploy some versions of DM (for example, v2.0.0-hotfix)? dm	252	January 30, 2023