29.12.11.12 The replication_group_member_stats Table

This table shows statistical information for replication group members. It is populated only when Group Replication is running.

The replication_group_member_stats table has these columns:

• CHANNEL_NAME

  Name of the Group Replication channel

• VIEW_ID

  Current view identifier for this group.

• MEMBER_ID

  The member server UUID. This has a different value for each member in the group. This also serves as a key because it is unique to each member.

• COUNT_TRANSACTIONS_IN_QUEUE

  The number of transactions in the queue pending conflict detection checks. Once the transactions have been checked for conflicts, if they pass the check, they are queued to be applied as well.

• COUNT_TRANSACTIONS_CHECKED

  The number of transactions that have been checked for conflicts.

• COUNT_CONFLICTS_DETECTED

  The number of transactions that have not passed the conflict detection check.

• COUNT_TRANSACTIONS_ROWS_VALIDATING

  Number of transaction rows which can be used for certification, but have not been garbage collected. Can be thought of as the current size of the conflict detection database against which each transaction is certified.

• TRANSACTIONS_COMMITTED_ALL_MEMBERS

  The transactions that have been successfully committed on all members of the replication group, shown as GTID Sets. This is updated at a fixed time interval.

• LAST_CONFLICT_FREE_TRANSACTION

  The transaction identifier of the last conflict free transaction which was checked.

• COUNT_TRANSACTIONS_REMOTE_IN_APPLIER_QUEUE

  The number of transactions that this member has received from the replication group which are waiting to be applied.

• COUNT_TRANSACTIONS_REMOTE_APPLIED

  Number of transactions this member has received from the group and applied.

• COUNT_TRANSACTIONS_LOCAL_PROPOSED

  Number of transactions which originated on this member and were sent to the group.

• COUNT_TRANSACTIONS_LOCAL_ROLLBACK

  Number of transactions which originated on this member and were rolled back by the group.

The replication_group_member_stats table has no indexes.

TRUNCATE TABLE is not permitted for the replication_group_member_stats table.