Perform low-level verification of the database tables.

p4 [g-opts] dbverify [-t db.tablename] [-U][-v]

The p4 dbverify command performs a series of low-level structural integrity checks on the Perforce database tables. Run this command periodically to determine if tables have become damaged.

By default, all current tables are verified. This can be computationally expensive and may require scheduled user downtime on large systems. To restrict verification to a specified table, use the name of the corresponding db.tablename file in the Perforce server root.

For a faster integrity check, use the -U option, which looks for tables with non-zero unlock counts. Each database table has an accompanying unlock count; when data is ready to be written to a table, the table’s unlock count is incremented and the table is locked. When the write is complete, the table is unlocked and its unlock count is decremented. If the process that writes the data does not unlock the table (or cannot, if, for example, the system goes down before the write is complete), the unlock count remains incremented.

Although the presence of a non-zero unlock count does not positively indicate corruption (and the presence of a zero unlock count does not guarantee data integrity), p4 dbverify -U has minimal performance impact.