Cheng Chang ee50b8d499 Be able to decrease background thread's CPU priority when creating database backup (#6602) ... Summary: When creating a database backup, the background threads will not only consume IO resources by copying files, but also consuming CPU such as by computing checksums. During peak times, the CPU consumption by the background threads might affect online queries. This PR makes it possible to decrease CPU priority of these threads when creating a new backup. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6602 Test Plan: make check Reviewed By: siying, zhichao-cao Differential Revision: D20683216 Pulled By: cheng-chang fbshipit-source-id: 9978b9ed9488e8ce135e90ca083e5b4b7221fd84		2020-03-28 19:07:25 -07:00
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backupable_db.cc	Be able to decrease background thread's CPU priority when creating database backup (#6602)	2020-03-28 19:07:25 -07:00
backupable_db_test.cc	Be able to decrease background thread's CPU priority when creating database backup (#6602)	2020-03-28 19:07:25 -07:00