AIX 6.1 reach the threshold of stream(no -a|grep strthresh)
last night i want to do oracle full backup with expdp when i switch to oracle it hangs,it looks like:
su - oracle
there is nothing feedback and hang ,but su - root work fine.
then i use truss su - oracle found it stuck at "ENOSR" ,then i changed the kernel parameter of strthresh from 85 to 90 and the su - oracle command works fine.
the no -a command output:
and i found the "delayed" column in the result of netstat -m output
is not 0,it likes:
my questions is :
1、how can i know the stream usage on aix 6.1?
and now i suspect the problem is network issue but i don't know how to affirm that.
thanks!
tony
2013/2/17
---------- Post updated at 10:08 PM ---------- Previous update was at 10:03 PM ----------
the strthresh means:
AIX has another no option called "strthresh" which is defined as "Specifies the maximum number of bytes Streams are normally allowed to allocate. When the threshold is passed, does not allow users without the appropriate privilege to open Streams, push modules, or write to Streams devices, and returns ENOSR. The threshold applies only to output side and does not affect data coming into the system` (e.g. console continues to work properly). A value of zero means that there is no threshold. The strthresh attribute represents a percentage of the thewall attribute and you can set its value from 0 to 100. The thewall attribute indicates the maximum number of bytes that can be allocated by Streams and Sockets using the net_malloc() call. When you change thewall attribute, the threshold gets updated accordingly." Thank you for using AIX Support Family Services.
Moderator's Comments:
Use code tags, thanks.
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