Michael Paquier e35cc3b3f2 pgbench: Use COPY for client-side data generation ... This commit switches the client-side data generation from INSERT queries to COPY for the two tables pgbench_branches and pgbench_tellers. pgbench_accounts was already using COPY. COPY is a better interface for bulk loading or high latency connections (this point can be countered with the option for server-side data generation, still client-side is the default), and measurements have proved that using it for these two other tables can lead to improvements during initialization. I did not notice slowdowns at large scale numbers on a local setup, either, most of the work happening for the accounts table. Previously COPY was only used for the pgbench_accounts table because the amount of data was much larger than the two other tables. The code is refactored so as all three tables use the same code path to execute the COPY queries, with a callback to build data rows. Author: Tristan Partin Discussion: https://postgr.es/m/CSTU5P82ONZ1.19XFUGHMXHBRY@c3po		2023-07-24 13:48:22 +09:00
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src	pgbench: Use COPY for client-side data generation	2023-07-24 13:48:22 +09:00
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