rman 并行 压缩的性能 时间 对比 backup as compressed

现有环境不用compressed 的主要原因应该是影响性能,同样26GB的database,不用compressed 1分钟备完,用了compressed 需要8-10分钟才能备完。

RMAN> backup DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 18:24:21

Finished Control File and SPFILE Autobackup at 2023-10-31 18:25:03

---42秒

RMAN> backup as compressed backupset DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 18:27:54

Finished Control File and SPFILE Autobackup at 2023-10-31 18:35:34

--8分钟

RMAN> backup as compressed backupset DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 18:39:18

Finished Control File and SPFILE Autobackup at 2023-10-31 18:49:12

--10分钟

RMAN> backup DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 18:49:47

Finished Control File and SPFILE Autobackup at 2023-10-31 18:50:42

--55秒

开启16 并行 4分钟 8并行 6分钟,但是CPU core消耗全部90%。

CONFIGURE DEVICE TYPE DISK PARALLELISM 16 BACKUP TYPE TO BACKUPSET;

RMAN> backup as compressed backupset DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 19:05:01

Finished Control File and SPFILE Autobackup at 2023-10-31 19:09:07

--4分钟

RMAN> CONFIGURE DEVICE TYPE DISK PARALLELISM 8 BACKUP TYPE TO BACKUPSET;

RMAN> backup as compressed backupset DATABASE plus ARCHIVELOG;

Starting backup at 2023-10-31 19:10:11

Finished Control File and SPFILE Autobackup at 2023-10-31 19:16:45

--6分钟

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