08-09-2012
To add to last post. Check following documents for explanations:
- Interpreting swap -s and swap -l output (Doc ID 1009356.1)
- How does Solaris Operating System calculate available swap? (Doc ID 1010585.1)
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1. UNIX for Dummies Questions & Answers
Hi there,
When I run top on my machine it says I have 497M swap space in use, and 380M swap space free,
but I have only allocated 512M swap space to the machine!!!!
Does anyone know how swap used is calculated in the top command?
Thanks... (1 Reply)
Discussion started by: chorgan
1 Replies
2. UNIX for Dummies Questions & Answers
Hi there,
I´m trying to get the information of vmstat & top in two different logfiles.
That not that difficult.
vmstat 30 >> myfile.log
top >> myfile2.log
But I also like to include a timestamp every 30 sec to be sure from what date the logs are.
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3. UNIX for Dummies Questions & Answers
Hello,
I would like to know if there is any difference between the pageing space and the swap space.
Thank you in advance. (1 Reply)
Discussion started by: VeroL
1 Replies
4. AIX
how do you get the paging space reduced without rebooting the machine ? the os is aix (2 Replies)
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5. UNIX for Dummies Questions & Answers
Hi
I have checked the output of top command in which there is a difference shown between the swap of top command for a process with total swap memory usage of the top command.
Swap usage of process is higher than the total swap memory usage.
top - 18:28:21 up 7:13, 5 users, load... (2 Replies)
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6. Solaris
Hi all,
I have a server running an Oracle database that is part of a Solaris M5000 container. Presumably this is referred to as a zone within a cluster, not sure if I get the terminology right.
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Discussion started by: newbie_01
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7. UNIX for Dummies Questions & Answers
Hi,
OS = Solaris 5.10
I need some guidance on interpreting vmstat to confirm whether my server is swapping or not. Can anyone please advise whether the column to check on the vmstat output is the pi column, does higher pi values means the server is swapping or am having swapping issues?
... (1 Reply)
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8. UNIX for Dummies Questions & Answers
Hi all,
OS = Solaris 5.10
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9. Linux
Hi,
i have done a blunder here, i increased the swap space on Xen5.6 server machine using below steps :-
1056 dd if=/dev/zero of=/root/myswapfile bs=1M count=1024
1057 ls -l /root/myswapfile
1058 chmod 600 /root/myswapfile
1059 mkswap /root/myswapfile
1060 swapon /root/myswapfile
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10. UNIX for Dummies Questions & Answers
RHEL 5.4
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Question1.
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LEARN ABOUT HPUX
swapmem_on
swapmem_on(5) OBSOLETE swapmem_on(5)
NAME
swapmem_on - OBSOLETE kernel tunable parameter
DESCRIPTION
The tunable is obsolete. Processes will always be allowed to use pseudo-swap space if it is available.
In previous versions of HP-UX, system configuration required sufficient physical swap space for the maximum possible number of processes on
the system. This is because HP-UX reserves swap space for a process when it is created, to ensure that a running process never needs to be
killed due to insufficient swap.
This was difficult, however, for systems needing gigabytes of swap space with gigabytes of physical memory, and those with workloads where
the entire load would always be in core. This tunable was created to allow system swap space to be less than core memory. To accomplish
this, a portion of physical memory is set aside as "pseudo-swap" space. While actual swap space is still available, processes still
reserve all the swap they will need at fork or execute time from the physical device or file system swap. Once this swap is completely
used, new processes do not reserve swap, and each page which would have been swapped to the physical device or file system is instead
locked in memory and counted as part of the pseudo-swap space.
WARNINGS
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
AUTHOR
was developed by HP.
Tunable Kernel Parameters swapmem_on(5)