Here's a good question about tuning. Why does my system continuously scan (sr) to free up pages when the amount of "fre" pages is well ABOVE my minfree and maxfree settings:
Here is sample output from a "vmstat -Itw 1" command:
I have been working with IBM and they suggested creating another paging space. That is just poopy talk because I don't want more paging space. I want it to quit scanning and work like it is suppose to! From what I understand it is NOT suppose to start scanning until the "fre" is less than the "minfree" and then it is suppose to scan and steal pages till the "fre" is equal to or greater than the "maxfree". Anyone have any ideas?
We finally upgraded to AIX 5.3 TL6 SP1 and now the system no longer pages like crazy. It hasn't grown from 1% for two days. Usually by now, it is up around 15%.
However, the system still constantly scans (sr in vmstat) even though our max_free is set at 2500 and there are usually around 6,000 free. Strange. I guess I'm just glad the thing quit paging. I'd still like to know how the numbers relate between minfree, maxfree, and fre. I don't think they have a 1-to-1 relationship.
I finally figured out we have 4 shared pools of memory and the "minfree" refers to the number of free frames in each pool. Since I have four pools, I have to take the "minfre" times 4 and that is what the "sr" is trying to keep free. Shesh... IBM had a hard time figuring this out.
Hi everyone,
I am using AIX 6.1. There are exception codes defined in header file
sys/m_except.hAlso, in the documentation (in "Understanding exception handling") it says:
If no exception handler is currently defined when an exception occurs, typically one of two things happens.
If... (0 Replies)
Hello,
How is it possible to free swap memory on AIX.
when i do vmstat on machine i can see less than 1 Gb "fre" when usually I have around 5 GB.
I dont wont to reboot the server.
any idea?
Thanks. (3 Replies)
Hi
When setting minfree to a certain percentage using the tunefs command, does this actually prevent users from accesing the partition when the limit is reached or not?.. It is a separate file system or not
More clarification regarding minfree will be useful for me . (6 Replies)
We have been tuning MySQL lately and I ran accoss two useful tools that you might be interested in:
mysqltuner.pl
tuning-primer.sh
Both of these scripts are quite useful for MySQL tuning. Here is some sample output of mysqltuner.pl
>> MySQLTuner 0.9.8 - Major Hayden... (3 Replies)
Hi,
I have a question about AIX vpaths and the fbvols you create via dscli on a DS8100 storage. Is there any command or any way to look which fbvol corresponds which vpath on operating system like the command fget_config -Av on a FastT storage system? I tried the datapath query device, datapath... (1 Reply)