pitrou commented on code in PR #35808:
URL: https://github.com/apache/arrow/pull/35808#discussion_r1210549409


##########
cpp/src/arrow/filesystem/s3fs.cc:
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@@ -1154,7 +1154,7 @@ class ObjectInputFile final : public io::RandomAccessFile 
{
 // AWS doc says "5 MB" but it's not clear whether those are MB or MiB,
 // so I chose the safer value.
 // (see 
https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPart.html)
-static constexpr int64_t kMinimumPartUpload = 5 * 1024 * 1024;
+static constexpr int64_t kMinimumPartUpload = 10 * 1024 * 1024;

Review Comment:
   It seems ok to me, it just means that we're using a bit more RAM to buffer 
outgoing bytes.



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