[pgpool-committers: 5408] pgpool: Enhance performance of CopyData message handling.

[Tatsuo Ishii]

Enhance performance of CopyData message handling.

When COPY XX FROM STDIN gets executed (typical client is pg_dump),
each copy row data is sent from Pgpool-II to frontend using CopyData
message. Previously, one CopyData message was followed by a flush,
which costed a lot. Instead, now flush is done in subsequent Command
Complete, Notice message or Error message.  A quick test reveals that
this change brings x2.5 speed up.

Discussion: https://www.pgpool.net/pipermail/pgpool-hackers/2018-December/003199.html

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=702f7c86f9b8f82f61e47235505715891ffe1b23

Modified Files
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src/protocol/pool_process_query.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)