Originally posted by: SystemAdmin
Check carefully with my vmstat -v, I think that I found the causes of the busy paging:
903286 pending disk I/Os blocked with no pbuf
3327074 paging space I/Os blocked with no psbuf
2740 filesystem I/Os blocked with no fsbuf
5179 client filesystem I/Os blocked with no fsbuf
8121 external pager filesystem I/Os blocked with no fsbuf
my pending disk is high, the paging space I/O is extremely high, of course the client filesytem also high according to some papers. Hence my questions are
1. How to solve the "no psbuf" for paging space?
one paper mentioned that it is the bug of OS (5.2) my is OS 5300-03-00
2. Which parameter I can apply for correct "no psbuf"?
3. for client system problem, I can increase the numfsbufs (my is 196 now). But the AIX doc says that I need to umount/mount the filesystem. which filesystem?
my /dbbaan or my $ORACLE_HOME. Steps as
a. umount /dbbaan (if this is the one causing problem)
b. ioo -p -o numfsbufs=1024
c. mount /dbbaan
after I apply, do I still need to reboot
4. for paging how can I umount/mount the pagaing space? by deactivate/activate
or
5. no paging for certain activities? How
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