请帮我分析一下 nmon这个工具的结果 非常感谢

CPU Utilisation -----------------------------------------------------------------------------------------------------------------|
| +-------------------------------------------------+ |
|CPU User% Sys% Wait% Idle|0 |25 |50 |75 100| |
| 1 52.0 8.5 0.0 39.5|UUUUUUUUUUUUUUUUUUUUUUUUUUssss > | |
| 2 1.6 3.3 0.0 95.1|s > |
| 3 2.5 0.5 0.0 97.0|U > | |
| 4 11.4 0.0 0.0 88.6|UUUUU > | |
| 5 21.8 1.0 0.0 77.2|UUUUUUUUUU > | |
| 6 13.4 0.0 0.0 86.6|UUUUUU > | |
| 7 9.0 0.0 0.0 91.0|UUUU > | |
| 8 15.4 0.5 0.0 84.1|UUUUUUU > |
| +-------------------------------------------------+ |
|Avg 16.6 1.6 0.0 81.9|UUUUUUUU > | |
| +-------------------------------------------------+ |
| Memory Stats --------------------------------------------------------------------------------------------------------------------|
| RAM High Low Swap |
| Total MB 2026.1 1151.8 874.3 5024.0 |
| Free MB 48.1 33.3 14.8 4966.6 |
| Free Percent 2.4% 2.9% 1.7% 98.9% |
| MB MB MB |
| Cached= 1363.3 Active= 1632.1 |
| Buffers= 512.1 Swapcached= 1.3 Inactive = 266.3 |
| Dirty = 0.2 Writeback = 0.0 Mapped = 1342.3 |
| Slab = 36.1 Commit_AS = 1618.0 PageTables= 21.8 |
| Network Error Counters ----------------------------------------------------------------------------------------------------------|
|I/F Name iErrors iDrop iOverrun iFrame oErrors oDrop oOverrun oCarrier oColls |
| lo 0 0 0 0 0 0 0 0 0 |
| eth0 3 0 0 3 0 0 0 0 0 |
| eth1 0 0 0 0 0 0 0 0 0 |
| sit0 0 0 0 0 0 0 0 0 0 |
| Disk I/O -----(/proc/diskstats)--------all data is Kbytes per second-------------------------------------------------------------|
|DiskName Busy Read WriteKB|0 |25 |50 |75 100| |
|sda 39% 1930.6 4018.5|WWWWWWWWWWWWWWRRRRRRR |> |
|sda1 0% 0.0 0.0|>disk busy not available | |
|sda2 0% 1930.6 4018.5|>disk busy not available | |
|dm-0 0% 0.0 55.8| |> |
|dm-1 0% 0.0 8.0|> | |
|dm-2 0% 0.0 0.0|> | |
|dm-3 0% 0.0 0.0|> | |
|dm-4 0% 0.0 6.0| > | |
|dm-5 0% 0.0 0.0|> | |
|dm-6 14% 39.8 77.7|WWWWWRRR |> |
|dm-7 1% 13.9 123.5|WR |> |
|dm-8 0% 0.0 0.0| >