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If --rate was used to throttle pgbench, it failed to sleep when it had nothing to do, leading to a busy-wait with 100% CPU usage. This bug was introduced in the refactoring in v10. Before that, sleep() was called with a timeout, even when there were no file descriptors to wait for. Reported by Jeff Janes, patch by Fabien COELHO. Backpatch to v10. Discussion: https://www.postgresql.org/message-id/CAMkU%3D1x5hoX0pLLKPRnXCy0T8uHoDvXdq%2B7kAM9eoC9_z72ucw%40mail.gmail.com |
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| pgbench.c | ||
| pgbench.h | ||