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Tuning OGGBD replicat to process LOB data in Snowflake (Doc ID 2956888.1)

Last updated on OCTOBER 06, 2023

Applies to:

Oracle GoldenGate Big Data and Application Adapters - Version and later
Information in this document applies to any platform.


How can we improve the snowflake  replicat performance when dealing with LOB Columns.


Log messages in OGGBD version < 21.10:

The following messages indicates LOB processing that can be tuned.

INFO  2023-03-29 16:29:37.000159 [main] - Operation aggregator is flushing

merged operations because the current operation contains at least one out of

line LOB column value that exceeds [16000] bytes.


Log messages in OGGBD version >= 21.10:

The current operation at position[<seqno>/<rba>] for table [<tablename>]

contains a LOB column [<column name>] of length [<N>] bytes that exceeds the

threshold of maximum inline LOB size [<N>].

Operation Aggregator will flush merged operations, this could degrade performance.

The maximum inline LOB size in bytes can be tuned using the configuration gg.maxInlineLobSize.


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