In this section are various notes/examples relating to Unix (primarily AIX).

Filesystems

• View
• Mount/Unmount
• Users Using
• Space Used In
• Change Size

Performance

• IO
• Memory

Miscellaneous

• Vim/Vi
• Fifo special files
• Useful finds

In this section are various notes/examples relating to Oracle

• Estimate Rollback Time
• Maximum mbrc

You can view disk throughput on Unix using the sar command:

root@tpo >sar -d 2 2

AIX tpo_prod 3 5 00C3A98E4C00    06/24/05

System configuration: lcpu=18 drives=10 

09:50:57     device    %busy    avque    r+w/s    Kbs/s   avwait   avserv

09:50:59     hdisk2      0      0.0        0        0      0.0      0.0
             hdisk0      1      0.0        2       26      0.0      6.9
             hdisk1      0      0.0        0        0      0.0      0.0
             hdisk3      1      0.0        7      960  768827.2      3.2
                cd0      0      0.0        0        0      0.0      0.0
             hdisk4      5      0.0       31      248  151998.1      4.8

To get from a device name to the relevant filesystem's you can do the following:

root@tpo >lspv -l hdisk3
hdisk3:
LV NAME               LPs   PPs   DISTRIBUTION          MOUNT POINT
loglv01               1     1     01..00..00..00..00    N/A
fslv00                1920  1920  400..400..399..400..321 /u01