In psql \copy from, send data to server in larger chunks. Previously, we would send each line as a separate CopyData message. That's pretty wasteful if the table is narrow, as each CopyData message has 5 bytes of overhead. For efficiency, buffer up and pack 8 kB of input data into each CopyData message.
The server also sends each line as a separate CopyData message in COPY TO STDOUT, and that's similarly wasteful. But that's documented in the FE/BE protocol description, so changing that would be a wire protocol break. Reviewed-by: Aleksander Alekseev Discussion: https://www.postgresql.org/message-id/40b2cec0-d0fb-3191-2ae1-9a3fe16a7e48%40iki.fi Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/eec57115e4c866f26bdc8bcbe3e2e7be4c6d0450 Modified Files -------------- src/bin/psql/copy.c | 99 ++++++++++++++++++++++++++++++----------------------- 1 file changed, 56 insertions(+), 43 deletions(-)
