In the complex ecosystem of log mining, where redo logs spin, SCNs advance, and data never sleeps, a clean detach ensures that no data is lost and that the next start will be flawless. For the vigilant DBA, the real work begins not when you see this message, but when you see it after an expected stop. An absent "successfully detached" log line is a far bigger warning than the message itself.
When the client is "attached," it is in a symbiotic, high-stakes embrace with the database. It holds a Logical Change Record (LCR) cache. It maintains a checkpoint. It lives in a state of high alert, knowing that if it fails, the target system will fall out of sync, threatening disaster recovery, reporting accuracy, or active-active failover. In the complex ecosystem of log mining, where
In an Integrated Capture deployment, the GoldenGate Extract does not read the redo logs directly from the disk. Instead, it acts as a client to a database log-mining server. When the Extract process stops—whether due to a manual command, a scheduled restart, or an unexpected error—the database registers that the client has unlinked itself from the mining sub-system. Common Causes for Detachment When the client is "attached," it is in