rtpsw commented on PR #35541:
URL: https://github.com/apache/arrow/pull/35541#issuecomment-1543748201

   I see a bunch of CI job 
([here](https://github.com/apache/arrow/actions/runs/4945533592/jobs/8842394608?pr=35541),
 
[here](https://github.com/apache/arrow/actions/runs/4945533592/jobs/8842394874?pr=35541),
 
[here](https://github.com/apache/arrow/actions/runs/4945533592/jobs/8842395019?pr=35541)
 and 
[here](https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/builds/47016479))
 are failing due to OOM, presumably on realignment, but the allocation sizes 
are not large. More concerning is [this 
failure](https://github.com/apache/arrow/actions/runs/4945533592/jobs/8842394197?pr=35541),
 which shows an invalid alignment of 3. Presumably, the data type of the value 
being realigned is some kind of struct. @westonpace, what are your thoughts? 
Perhaps there is an API (or idiom) to get the byte width of the largest field 
of the data type, which I think would be the correct alignment in such a case?


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