vmstat -v shows that about 20% of memory pages are pinned (that would roughly correspond to those 13 GB for kernel). Does it mean that application doesn't use memory pinning (server is running Oracle+SAP)? svmon tells me that oracle and workprocesses use about 33 MB of pinned memory, perhaps it's the way they are designed. I'll have to check on some testing system what happens, if you continually increase memory for aplication, how it will affect OS behaviour.
Hello,
I'm using a unix server (HP rp2450) which has : 2 Go RAM memory and 4 Go swap.
Here is the result of vmstat -n command :
$ vmstat -n
VM
memory page faults
avm free re at pi po fr de sr in sy ... (5 Replies)
This is post number 3 in a series of unanswered "TUNING" questions. :D
With AIX 5.3 TL4, the page size can vary from the original "4k". They can now be "64k" and a couple other sizes. They also do not have to all be the same. Some can remain "4k" while others are "64k" which is what seems to... (2 Replies)
Hi
I am trying to investigate a disk performance issue, and we are not seem to be hitting the right direction in our analysis.
This is a FC disk running on USP1000 HDS system. The application is an IO intensive application, but our opinion is that it is not performing due to perceived disk... (1 Reply)
Dear friends. can anybody suggest me what to be considered in order to achieve maximum performance of AIX on which DB2 will be installed
Thanks is advance :) (1 Reply)
Dears i want to have a clear view about this tuning parameters and what they related to FS or Oracle , and how to figure the percentage of them .
maxperm%
maxclient%
v_pinshm = 1
lgpg_regions = 0
lpgp_size = 0 (3 Replies)
For some reason, my AIX 5.2 box has become slow in accepting telnet requests from others boxes. Windows, times out the connection, whereas, Unix it will wait for the AIX to display the login. I connect and it respawns back and says connected, but then sits and wait for what seems forever to get the... (5 Replies)
Hi,
we've a gigabit Ethernet adapter. And we wanted to improve the performance by tuning network parameters. so' as per IBM info center,
http://publib.boulder.ibm.com/infocenter/aix/v7r1/index.jsp?topic=%2Fcom.ibm.aix.prftungd%2Fdoc%2Fprftungd%2Fnetw_opt.htm
we tried changing the tuning... (2 Replies)
I have a IBM Power9 server coupled with a NVMe StorWize V7000 GEN3 storage, doing some benchmarks and noticing that single thread I/O (80% Read / 20% Write, common OLTP I/O profile) seems slow.
./xdisk -R0 -r80 -b 8k -M 1 -f /usr1/testing -t60 -OD -V
BS Proc AIO read% IO Flag IO/s ... (8 Replies)
Discussion started by: c3rb3rus
8 Replies
LEARN ABOUT OSX
vm_stat
VM_STAT(1) BSD General Commands Manual VM_STAT(1)NAME
vm_stat -- show Mach virtual memory statistics
SYNOPSIS
vm_stat [[-c count] interval]
DESCRIPTION
vm_stat displays Mach virtual memory statistics. If the optional interval is specified, then vm_stat will display the statistics every
interval seconds. In this case, each line of output displays the change in each statistic (an interval count of 1 displays the values per
second). However, the first line of output following each banner displays the system-wide totals for each statistic. If a count is pro-
vided, the command will terminate after count intervals. The following values are displayed:
Pages free
the total number of free pages in the system.
Pages active
the total number of pages currently in use and pageable.
Pages inactive
the total number of pages on the inactive list.
Pages speculative
the total number of pages on the speculative list.
Pages throttled
the total number of pages on the throttled list (not wired but not pageable).
Pages wired down
the total number of pages wired down. That is, pages that cannot be paged out.
Pages purgeable
the total number of purgeable pages.
Translation faults
the number of times the "vm_fault" routine has been called.
Pages copy-on-write
the number of faults that caused a page to be copied (generally caused by copy-on-write faults).
Pages zero filled
the total number of pages that have been zero-filled on demand.
Pages reactivated
the total number of pages that have been moved from the inactive list to the active list (reactivated).
Pages purged
the total number of pages that have been purged.
File-backed pages
the total number of pages that are file-backed (non-swap)
Anonymous pages
the total number of pages that are anonymous
Uncompressed pages
the total number of pages (uncompressed) held within the compressor
Pages used by VM compressor:
the number of pages used to store compressed VM pages.
Pages decompressed
the total number of pages that have been decompressed by the VM compressor.
Pages compressed
the total number of pages that have been compressed by the VM compressor.
Pageins
the total number of requests for pages from a pager (such as the inode pager).
Pageouts
the total number of pages that have been paged out.
Swapins
the total number of compressed pages that have been swapped out to disk.
Swapouts
the total number of compressed pages that have been swapped back in from disk.
If interval is not specified, then vm_stat displays all accumulated statistics along with the page size.
Mac OS X August 13, 1997 Mac OS X