Oracle9i Database Reference Release 1 (9.0.1) Part Number A90190-02 |
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Initialization Parameters, 8 of 220
ARCHIVE_LAG_TARGET
limits the amount of data that can be lost and effectively increases the availability of the standby database by forcing a log switch after a user-specified time period elapses.
A 0 value disables the time-based thread advance feature; otherwise, the value represents the number of seconds. Values larger than 7200 seconds are not of much use in maintaining a reasonable lag in the standby database. The typical, or recommended value is 1800 (30 minutes). Extremely low values can result in frequent log switches, which could degrade performance; such values can also make the archiver process too busy to archive the continuously generated logs.
See Also:
For more information about criteria for setting this parameter, see Oracle9i Data Guard Concepts and Administration |
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