学习ibm官方的aix6.1性能调优

aix6.1
Optimizing AIX 6.1 performance tuning Tuning methodology, general enhancements, monitoring, and tuning
https://www.ibm.com/developerworks/aix/library/au-aix6tuning/au-aix6tuning-pdf.pdf
感觉主要是介绍了aix6.1相对于aix5.3性能调优方面的一些新特性。
方法论：
Tuning methodology
The five-step methodology consists of:
1. Establishing a baseline
2. Stress testing and monitoring
3. Identification of bottleneck
4. Tuning bottleneck
5. Repeat (starting with the second step)

其中的一些工具
memory: vmo  # Manages Virtual Memory Manager tunable parameters.
vmo -F -a    #查看命令
cpu: schedo     #Manages processor scheduler tunable parameters.
schedo -F -a  
i/o: ioo   #Manages Input/Output tunable parameters.
ioo -F -a    
i/o pacing: pstat        # Interprets the contents of the various system tables and writes it to standard output.
pstat -a | grep aio

In AIX 6.1, the tunables fastpath and fsfastpath are now restricted tunables and set to 1 by
default. It has the following effect on the tunables (see Listing 9):
? fastpath: AIO requests that raw logical volumes get passed directly to the disk layer.
? fsfastpath: AIO requests that files opened with concurrent I/O on JFS2 get passed directly to LVM or disk.

Network and Network File System (NFS) I/O:
no #Manages network tuning parameters.
no -F -a

NFS:  nfso  #Manages Network File System (NFS) tuning parameters
nfso -a