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Integrated Extract Facing LAG Due To Snapshot Query Error 1466 (Doc ID 2465449.1)

Last updated on JULY 20, 2024

Applies to:

Oracle GoldenGate - Version 12.1.2.0.2 and later
Information in this document applies to any platform.

Symptoms

Integrated Extract facing huge lag.

When enabling xml GoldenGate activity logging for the extract, we can see this message:

2018-10-09 19:00:30.770 INFO |ggstd.ptrace                  |main| 8730 ggdbora/dboci8.c         | Encounter snapshot-related error 1466 on snapshot fetch by key query.

 

The 1466 is Oracle RDBMS error for Snapshot Query feature:

$ oerr ora 1466
01466, 00000, "unable to read data - table definition has changed"
// *Cause: Query parsed after tbl (or index) change, and executed
//         w/old snapshot
// *Action: commit (or rollback) transaction, and re-execute

 

Changes

 Goldengate extract using FETCHOPTIONS USESNAPSHOT, which uses RDBMS Snapshot Query underneath.

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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