08-13-2013
- Yes, thatīs totally normal. Most RAM is being used to cache files so access to slower disks can be hopefully avoided.
- Correct, see 1. It depends on your tuning parameters when and how much memory will be freed. Usually from AIX 5.3 TL... (forgot it), the tuning parameters for VMM are good and usually donīt need adjustment.
- If your system actually does page out to Paging Space or page in from there, it will be very slow. So either by tuning or enough memory, you will try to avoid paging at all cost. Therefore these days, you can use a fix amount of Paging Space, which may be rather small compared to RAM. I would use a fix size of 5 GB.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi All,
I have a question, can you guys please help me by giving your valuable suggestons:
I am using AIX 5L, running oracle 7 version. I need to increase the oracle memory to 40 MB more. Currently Oracle occupies 260M. I wanted to know whether I can increase the memory without any problem.... (1 Reply)
Discussion started by: kollam68
1 Replies
2. AIX
Hi All,
I have a question, can you guys please help me by giving your valuable suggestons:
I am using AIX 5L, running oracle 7 version. I need to increase the oracle memory to 40 MB more. Currently Oracle occupies 260M. I wanted to know whether I can increase the memory without any problem.... (3 Replies)
Discussion started by: kollam68
3 Replies
3. AIX
Hi,
We have AIX 5.1 machine of RAM 8 GB and paging space is 8GB. we are getting high memory usage of almost 99%.Can anybody please help in this ?
Partial vmstat o/p
kthr memory
----- -----------
r b avm fre
2 1 278727 1143
There is no paging issue.Becoz in... (5 Replies)
Discussion started by: jayakumarrt
5 Replies
4. AIX
How to check the memory usage on AIX by various processes? (1 Reply)
Discussion started by: aajmani
1 Replies
5. HP-UX
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies
6. AIX
How to monitor the IBM AIX server for I/O usage, memory usage, CPU usage, network usage, storage usage? (3 Replies)
Discussion started by: laknar
3 Replies
7. AIX
Hi,
I have AIX 5.3TL8 two node cluster using HACMP and have 10g database using RAW devices. I am seeing gradual increase in comp% memory everyday and it reaches 100% and evicts the node, we had 4 evictions in 40days.
I am pasting vmstat and vmo output, anyone seen this issue?
... (5 Replies)
Discussion started by: navin7386
5 Replies
8. AIX
hi,
I want to ask , my AIX 6.1 is always used about 97% memory.
Is this normal ?
or any command can free up memory like Linux ?
thanks. (1 Reply)
Discussion started by: virusxx
1 Replies
9. AIX
Hello,
Am working on small program that used to calculate the memory usage of AIX servers. Am using svmon -G command to get the memory usage. For example, consider the following output.
$ svmon -G
size inuse free pin virtual mmode
memory ... (9 Replies)
Discussion started by: maruthu
9 Replies
10. AIX
Hi, i have 2 identical web servers using AIX. I use nmon analyser to check their performance.
The server A exceeds 20% memory usage for system, 5% for cache and the rest 75% for processes. While, it uses 4% of Paging Space.
The server B exceeds 20% for system, 45% for cache and 35% for processes.... (24 Replies)
Discussion started by: dim
24 Replies
LEARN ABOUT HPUX
vxfs_ifree_timelag
vxfs_ifree_timelag(5) File Formats Manual vxfs_ifree_timelag(5)
NAME
vxfs_ifree_timelag - VxFS inode free time lag (specifies the minimum time to be spent on a freelist)
SYNOPSIS
VALUE
Specify an integer value.
Minimum
None
Maximum
None
Default
0
DESCRIPTION
In VxFS, the unused inodes are put on a freelist. The memory space for this unused inode is freed if it stays on the freelist for a speci-
fied amount of time. The tunable specifies the minimum amount of time should spend on a freelist before its memory space is freed. The time
is specified in seconds.
is a dynamic tunable. Any changes to take effect immediately.
EXAMPLES
Change the value of to 2400 seconds:
WARNING
Incorrect tuning of may adversely affect system performance.
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or its meaning may change in the future releases
of HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
SEE ALSO
kctune(1M), vx_maxlink(5), vx_ninode(5), vxfs_bc_bufhwm(5).
Tunable Kernel Parameters vxfs_ifree_timelag(5)