Paweł Dziepak 7bb41b50f9 commitlog: avoid copying column_mapping ...

It is safe to copy column_mapping accros shards. Such guarantee comes at
the cost of performance.

This patch makes commitlog_entry_writer use IDL generated writer to
serialise commitlog_entry so that column_mapping is not copied. This
also simplifies commitlog_entry itself.

Performance difference tested with:
perf_simple_query -c4 --write --duration 60
(medians)
          before       after      diff
write   79434.35    89247.54    +12.3%

(cherry picked from commit 374c8a56ac)

Also: Fixes #2468.

2017-06-11 15:44:20 +03:00

2.1 KiB

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