Latest FAQ topics - TiDB Forum

Topic	Views	Activity
After a changefeed resumes from pause, its replication latency gets higher and higher and returns to normal only after a few minutes. Why? ticdc	197	January 30, 2023
Why does replication using TiCDC stall or even stop after data restore using TiDB Lightning and BR from upstream? ticdc	107	January 30, 2023
Why does TiCDC use disks? When does TiCDC write to disks? Does TiCDC use memory buffer to improve replication performance? ticdc	118	January 30, 2023
When the sink of the replication downstream is TiDB or MySQL, what permissions do users of the downstream database need? ticdc	105	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	106	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	126	January 30, 2023
How much PD storage does TiCDC use? ticdc	117	January 30, 2023
When TiCDC replicates data to Kafka, how do I know the timestamp of the data changes in a message? ticdc	105	January 30, 2023
When TiCDC replicates data to Kafka, does a message contain multiple types of data changes? ticdc	120	January 30, 2023
If I modify a row multiple times in a transaction, will TiCDC output multiple row change events? ticdc	106	January 30, 2023
How to understand the relationship between the TiCDC time zone and the time zones of the upstream/downstream databases? ticdc	114	January 30, 2023
What is the complete behavior of TiCDC garbage collection (GC) safepoint? ticdc	164	January 30, 2023
How do I choose `start-ts` when creating a task in TiCDC? ticdc	109	January 30, 2023
Why does the load unit report the `Unknown character set` error? dm	101	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	158	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	105	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	105	January 30, 2023
In DM v2.0, why does the full import task fail if DM restarts during the task? dm	141	January 30, 2023
Why do `REPLACE` statements keep appearing in the downstream when DM is replicating? dm	100	January 30, 2023
Why do some monitoring panels show `No data point`? dm	105	January 30, 2023
How to handle the error `duplicate entry` when DM is replicating data? dm	121	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	105	January 30, 2023
Why does the `replicate lag` monitor metric show no data when DM is not replicating from upstream? dm	99	January 30, 2023
How to handle the error `parse mydumper metadata error: EOF` that occurs when DM is replicating data? dm	101	January 30, 2023
Why does TiUP fail to deploy some versions of DM (for example, v2.0.0-hotfix)? dm	97	January 30, 2023
How to handle the error `Error 1054: Unknown column 'binlog_gtid' in 'field list'` that occurs when existing DM migration tasks of an DM 1.0 cluster are running on a DM 2.0 or newer cluster? dm	103	January 30, 2023
How to handle the error `packet for query is too large. Try adjusting the 'max_allowed_packet' variable` that occurs during the full import? dm	102	January 30, 2023
In the `Sync` stage dm	102	January 30, 2023
In the `Load` stage dm	100	January 30, 2023
In the `Dump` stage dm	107	January 30, 2023