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6#
发表于 2013-8-7 18:18:57
其实我感觉老的aix的调整方法今天依然奏效(印象中是AIX 5204为界限吧,有待去aix网站考证):
针对裸设备和asm:
1,调整os参数:
vmo -p -o minperm%=5 #现值为20
vmo -p -o maxclient%=10 #现值为80
vmo -p -o maxperm%=10 #现值为80
vmo -p -o strict_maxperm=1 #现值为0
(20和80实际上我印象中是缺省值,hp的名称不同的相应参数是50为缺省值)
2,对于aix,lock_sga=true很有效,建议
对于文件系统(rman ,java相关的系统等等):
1. Review related DB issue in Note. 316533.1
Set the following values as start point
MINPERM% = 10-15%, MAXPERM% = 20-30%, MAXCLIENT% = MAXPERM%, tune the MINPERM, MAXPERM and MAXCLIENT parameters (for AIX VMM) to have concurrent I/O for DB disk access
2. Also, more specifically, ensure to update parameter - lru_file_repage.
The default value is "1", but it is recommended to set this to "0". This setting allows the VMM to only steal file pages (from the AIX file buffer cache) and leave the computational pages (from the SGA) alone.
The new "lru_file_repage" parameter is only available in AIX 5.2 ML04+ and AIX 5.3 ML01+"
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