Deflake DeleteSchedulerTest.StartBGEmptyTrashMultipleTimes (#9706)
Summary: The designed sync point may not be hit if trash file is generated faster than deleting. Then the file will be deleted directly instead of waiting for background trash empty thread to do it. Increase SstFileManager Trash/DB ratio to avoid that. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9706 Test Plan: `gtest-parallel ./delete_scheduler_test --gtest_filter=DeleteSchedulerTest.StartBGEmptyTrashMultipleTimes -r 10000 -w 100` It was likely to happen on one of the host. Reviewed By: riversand963 Differential Revision: D34964735 Pulled By: jay-zhuang fbshipit-source-id: bb78015489b5f6b3f11783aae7e5853ea197702c
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