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doc: Add memory tuning section to user guide #684

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doc: Add memory tuning section to user guide #684

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doc: Add memory tuning section to user guide
viirya Jul 18, 2024
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Update docs/source/user-guide/tuning.md
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viirya Jul 19, 2024
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11 changes: 11 additions & 0 deletions docs/source/user-guide/tuning.md
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Expand Up @@ -21,6 +21,17 @@ under the License.

Comet provides some tuning options to help you get the best performance from your queries.

## Memory Tuning

Comet currently doesn't share the memory allocation from Spark but owns its own memory allocation.
That's said, Comet requires additional memory to be allocated. Comet provides some memory related configurations to help you tune the memory usage.

By default, the amount of memory is `spark.comet.memory.overhead.factor` * `spark.executor.memory`.
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`COMET_MEMORY_OVERHEAD_FACTOR`'s default value is 0.2. You can increase the factor to require more
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memory for Comet to use, if you see OOM error.
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Besides, you can also set the memory explicitly by setting `spark.comet.memoryOverhead` to the desired value.
Comet will allocate at least `spark.comet.memory.overhead.min` memory.

## Shuffle

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