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由 xiong-gang 提交于
pqFlush is sending data synchronously though the socket is set O_NONBLOCK, this incurs performance downgradation. This commit uses pqFlushNonBlocking instead, and synchronizes the completion of dispatching to all Gangs before query execution. Signed-off-by: Kenan Yao<kyao@pivotal.io>
2516eac6