Information Schema XTRADB_READ_VIEW Table

MariaDB starting with 10.0.9

The XTRADB_READ_VIEW table was added in MariaDB 10.0.9.

The Information Schema XTRADB_READ_VIEW table contains information about the oldest active transaction in the system.

The PROCESS privilege is required to view the table.

It has the following columns:

Column Description
READ_VIEW_UNDO_NUMBER
READ_VIEW_LOW_LIMIT_TRX_NUMBER Highest transaction number at the time the view was created.
READ_VIEW_UPPER_LIMIT_TRX_ID Highest transaction ID at the time the view was created. Should not see newer transactions with IDs equal to or greater than the value.
READ_VIEW_LOW_LIMIT_TRX_ID Latest committed transaction ID at the time the oldest view was created. Should see all transactions with IDs equal to or less than the value.
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https://mariadb.com/kb/en/information-schema-xtradb_read_view-table/