Increasing swap size??

Hello all,
I am trying to get a very old G3 up and running with 10.3 and I am wondering, is there a way to increase the default swap size? If I use the default it won't run very well so I am wondering if I can compensate with loading up on swap.

Lovell,
First, don't compare the performance of the Beige with OSX to your newer Macs; it's at least nine years old. My upgraded Beige G3 felt very swift with OSX until I got a G4 MDD at works.
Hardware config is everything for the Beige G3 series. T'is a wonderful yet strange beast that came in three form factors, three logic board ROM revisions, and with both SCSI and ATA hard drives. All those affect getting OSX installed and running with acceptable results. If you can repost the question in the Beige G3 forums here, I believe you will get focused help from people very familiar with the hardware issues this machine presents. Make sure you post as much about your hardware config as possible, especially case form factor (desktop, minitower, or all-in-one), processor speed, RAM installed, hard drive size and type, etc. Once that forum knows your hardware issues, they can walk you through the process.
Kappy is right: one of the hardware limitation of the Beige G3 ROM means OSX likes as much RAM as you can throw at it. Effective max RAM is 768MB regardless of what several outdated tech documents say.

Similar Messages

Can I increase swap size by just adding a swap file for permanent?

Hello,
I am doing installation of oracle 11gR2 database on Linux.
the swap area size is not enough. so can't go thought OUI's pre-system check before installation.
the system administrator says, he really feel hard to find out any free uppartitioned disk space for adding more to current swap.
he wants me to see if he can add a swap file (rather than an entire device/partition) for swap space.
I checked docs:
How to Create a Swap Device on Enterprise Linux [ID 432991.1]
it says,
"If no free, unpartitioned disk space exists, a swap file (rather than an entire device/partition) can be used for swap space as a *temporary*"
but why temporary? why not permanent (I don't want to have trouble in future) is there anyone can help me to confirm?
Thank you very much in advance.

995137 wrote:
HI Osama,
thank you for answering.
To my understanding, there should be no harm for database in future, f we increase swap size by adding a swap file, right?
many thanks !!!Right!
add another swap file

How to increase disk size in solaris

Hi all
I have two disk c1t0d0s0 / c1t0d0s7
I do haven't space in disk /dev/dsk/c1t0d0s0
run df -h
/dev/dsk/*c1t0d0s0* 8,8G 7,4G 1,3G 86% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 3,4G 984K 3,4G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
/usr/lib/libc/libc_hwcap1.so.1
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swap 3,4G 40K 3,4G 1% /var/run
/dev/dsk/*c1t0d0s7* 20G 21M 20G 1% /export/home
I want increasing the space in c1t0d0s0. when I installed Solaris 10 I do not looked attentively the size allocated
Thanks

Hi,
As I understand, you want to increase the size of the root partition (where you installed Solaris) which resides in c1t0d0s0. I think it can be done using Concatenations from Solaris Volume Manager (SVM).
I have tried it in non root partition like /export/home and it is very easy.
metainit -f d0 2 1 c1t0d0s7 1 c2t0d0s7 //this will create volume d0 as a concatenation
growfs -M /export/home /dev/md/rdsk/d0 //this will grow the /export/home partition
Regards,
Rei

Swap size and / space from Oracle Linux VM Template

Hi,
I created few VMs with OVM_OL5U8_x86_64_PVM.ova.
However, root file system is 10GB and swap is 2GB even I created 50GB virtual disk for VM system.
I can't change these fixed size.
Can I increase this from template?
I create additional virtual disk and add to VM to use bigger swap(using OS command) but just want to implement default system virtual disk provides bigger than 10GB root filesystem and bigger swap size.
Thanks,
Jason

I tried exactly same with another disk but got same error please find the screen shots.

How to determine SWAP size ??? (Netra 440/ Solaris 10)

Hi Friends
I have trouble with the following OUTPUTs:
# prtdiag
System Configuration: Sun Microsystems sun4u Sun Fire V440
System clock frequency: 177 MHZ
Memory size: 8GB
# /usr/sbin/swap -l
swapfile dev swaplo blocks free
/dev/vx/dsk/bootdg/swapvol 291,7000 16 16373168 13437120
# swap -s
total: 6495832k bytes allocated + 236328k reserved = 6732160k used, 6942968k available
# df -k
Filesystem kbytes used avail capacity Mounted on
/dev/vx/dsk/bootdg/rootvol 62516603 34004373 27887064 55% /
/devices 0 0 0 0% /devices
ctfs 0 0 0 0% /system/contract
proc 0 0 0 0% /proc
mnttab 0 0 0 0% /etc/mnttab
swap 6962904 1608 6961296 1% /etc/svc/volatile
objfs 0 0 0 0% /system/object
/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap1.so.1 62516603 34004373 27887064 55% /platform/sun4u-us3/lib/libc_psr.so.1
/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1 62516603 34004373 27887064 55% /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1
fd 0 0 0 0% /dev/fd
swap 6965712 4416 6961296 1% /tmp
swap 6961344 48 6961296 1% /var/run
swap 6961296 0 6961296 0% /dev/vx/dmp
swap 6961296 0 6961296 0% /dev/vx/rdmp
/dev/vx/dsk/bgw1dg/vol01 203768832 129151641 70294743 65% /var/opt/BGw/Server1
/dev/vx/dsk/ora1dg/vol01 10480640 5502642 4666959 55% /var/opt/mediation/ora
/dev/dsk/c1t2d0s2 70589121 219550 69663680 1% /mnt
At first I would have said that the total SWAP size is 6,6GB, but now I am in doubt since I see several SWAP line on the df OUTPUT.
Please help:
1. What is the total SWAP size for the machine?
2. Why is there 4 lines mentionning SWAP on the df OUTPUT?
3. With 8GB of RAM on this machine do I need to increase the SWAP?
4. If yes how to increase the SWAP?
Thanks in advance !

Swap can be a confusing thing. It's an overloaded term that people often use to mean somewhat different things.
1. Determine the swap allocated for the system with swap -l. The number of blocks minus the swaplo value will give you the true count. Blocks are 512 bytes, so do the math to get a GB value.
2. df output reflects file systems that are currently in use. In Solaris 10 there are a few virtual file systems that are backed by swap space itself. You'll notice all these swap fs components have the same size because they use the swap as a common pool.
3. Sizing swap shouldn't be based strictly on the amount of physical memory available. While there are guidelines for doing precisely that, those guidelines are given for the general case (i.e., no information on the apps that will be running). Monitoring demand is key. swap -s and vmstat will both give you a good general view of the demand for swap.
But, if you're a guidelines sort of person:
http://docs.sun.com/app/docs/doc/817-5093/fsswap-31050?a=view
4. The easiest way to increase swap is to make files that can be added to the overall swap space. I generally prefer this approach from the ground up, because it means I never have to dedicate disk space to a swap region. There are different steps for doing it with UFS and ZFS. Here's the ufs way:
a) Pick a UFS file system with space on a disk that isn't hot. Make a swap file and add it to the swap space like so:
- # mkfile 1024m /filesys2/swapfile
- # swap -a /filesys2/swapfile
Then check the outcome with swap -l and swap -s.
In many cases I will add a swap file to a customer's system and remove the partition-based swap (swap -d) that they have. There is no appreciable difference in performance and the flexibility of moving swap can come in handy when a system has to accept a different workload with a minimum of downtime.

Increased RAM size

Hi all,
i have increased RAM size to 32 GB in our production server. currently we have 40 GB of SWAP. now i want know how to distribute the RAM size to database , SAP and operating system. please let me know the parameters for increase.
Operating system : SuSE 10 SP2
Database : oracle 10.2.0.2
SAP : SAP ECC 6.0 SR2 (ABAP stack only)
ztta/roll_area        6500000
ztta/roll_first       1
ztta/short_area       4000000
rdisp/ROLL_SHM        32768
rdisp/PG_SHM          32768
rdisp/PG_LOCAL        150
em/initial_size_MB    5120
em/blocksize_KB       4096
em/address_space_MB   4096
ztta/roll_extension   2000000000
abap/heap_area_dia    2000000000
abap/heap_area_nondia 2000000000
abap/heap_area_total 2000000000
abap/heaplimit        40000000
abap/use_paging       0
please give you valuable suggestions and whether it is required to increase the swap size
regards
Ramesh
Edited by: Ramesh Sammiti on Oct 26, 2009 10:54 AM

As this is production system, you better go with SAP's recommendations.
You do Zero memory (Default memory parameters) open an OSS message and probably
you can do quick sizer modeling also.
service.sap.com/quicksizer
All the best,
Nagaraju

Swap size issues-Unable to install DB!!

Unable to install DB. End part i am getting failed due to swap size issue .. FYI...
[root@usr~]# df -h
Filesystem            Size Used Avail Use% Mounted on
/dev/hda2             5.9G 5.9G     0 100% /
/dev/hda3             3.0G 848M 2.0G 31% /tmp
/dev/hda5              34G   12G   21G 37% /refresh
/dev/hda1              99M   12M   83M 12% /boot
tmpfs                 3.9G     0 3.9G   0% /dev/shm
[root@usr~]#
Please help me...Thanks

You can increase your swap space.. I have also faced same issue
Just try: http://www.thegeekstuff.com/2010/08/how-to-add-swap-space/
~J

Oracle Coherence increasing Swap Utilization

We are using Oracle Coherence on linux servers. However, we noticed that because of Coherence processes running, often our swap utilization % increases too much, sometimes becoming more than 98%, even touched 100% a few times.
Once we kill all the coherence related processes, then it becomes normal.
Is there any way we can make coherence processes to only use a particular size of Swap space ?
Currently increasing swap space is not in our scope.
Please suggest.
Edited by: user7761515 on May 3, 2012 11:29 AM

Hi,
We are using Oracle Coherence on linux servers. However, we noticed that because of Coherence processes running, often our swap utilization % increases too much, sometimes becoming more than 98%, even touched 100% a few times.
Swapping itself (1%-100%) is not a good sign and should be avoided by ensure that you have sufficient memory such that you are not making active use of swap space on your machines. The active usage of SWAP space will have significant performance degradation.
Is there any way we can make coherence processes to only use a particular size of Swap space ?Manage your memory by allocating heap using -Xmx for Coherence JVMs. You need to ensure that the sufficient RAM memory is available on the server for Coherence JVMs and other operating system processes and do not consume all the RAM.
To temporarily set the swappiness, as the root user echo a value onto /proc/sys/vm/swappiness. The following command will set swappniess to 0:
echo 0 >/proc/sys/vm/swappiness //To set the value permanently, modify the /etc/sysctl.conf file.
Hope this helps!
Cheers,
NJ

Swap Size

hi all
can anyone guide me how to increase the Swap size after installation the linux?
Sarah

QGIRCO wrote:
hi all
can anyone guide me how to increase the Swap size after installing the linux?
Sarahplease follow:
http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/custom-guide/s1-swap-adding.html
http://www.linux.com/archive/feature/113956
Regards
Rajesh

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Memory parameters settings as per RAM and swap size

Hello Experts,
We have installed the newly SAP systems (Solman 7.1, ECC6 EHP 5, and CRM EHP1), below is the platform-
OS - Linux x86_64
RAM - 20 GB (ECD ABAP and solman (ABAP+JAVA)) and 24 GB (CRM ABAP).
swap size is twice of RAM.
Kernel - 720 64bit
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ztta/roll_area                6500000
ztta/roll_first               1
ztta/short_area               3200000
rdisp/ROLL_SHM                32768
rdisp/PG_SHM                  32768
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em/blocksize_KB               4096
em/address_space_MB           4096
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abap/heap_area_dia            2000000000
abap/heap_area_nondia         2000000000
abap/heap_area_total          2000000000
abap/heaplimit                40000000
abap/use_paging               0
Could anyone suggest the calculation for above parameters so I can tune it according to my platform to avoid any memory bottleneck.
Regards
Saurabh Mishra

HI
For 20 Gb Instance                                                                     For 24 GB
ztta/roll_area                  6500000                                               em/initial_size_MB            16000 MB
ztta/roll_first                   1
ztta/short_area               3200000
rdisp/ROLL_SHM             32768
rdisp/PG_SHM                  32768
rdisp/PG_LOCAL              150
em/initial_size_MB            12000
em/blocksize_KB               4096
em/address_space_MB     4096
ztta/roll_extension              2000000000
abap/heap_area_dia           2000000000
abap/heap_area_nondia     10000000000
abap/heap_area_total         12000000000
abap/heaplimit                            40000000
abap/use_paging               0
and Configure ABAP Buffer abap /buffer size of 800 MB(Initially)
CUA and Screen Buffer of 20 Mb each.
The lowered values because DB Should be considered while changing SAP Memory,even though memory is allocated on need basis.
Regards
Arun.H

Increasing swap size??

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