memory_target &/dev/shm optimum size

Similar Questions

• What is the optimum size of the memory cache for Thunderbird?

  Not sure if the cache is of an appropriate size to launch Thunderbird.
  Sometimes the message seem to be missing and then reappear. Not all messages seem to be displayed?

  http://KB.mozillazine.org/browser.cache.memory.capacity

• Crop the optimum size of the static image

  I was going to ask "What is the optimal size for images created in Photoshop for use in the videos?" but it looks like my question is answered https://forums.Adobe.com/thread/1384976 et https://forums.Adobe.com/thread/450798

  However, much of what he talks about which resembles a fairly complex/lengthy process - is actually a bit more than my head - and I was wondering if it is possible to cut corners without sacrificing quality as well.

  For example, imagine a video that features enough base png and jpg, including drawings in black and white simple and some images with many colors but not works of art. If I just use 600 pixels default width for the creation of my images before importing them into Premier Pro, will likely look okay?

  If an image does not appear if hot, I could just remove the Prime Minister, then re-create it in Photoshop with more bandwidth and reimport it in first, right?

  Thank you.

  I would NOT make images smaller than my video size of the image. So if you get a normal high definition 1920 x 1080 video, I would like to make this size of pixels, either them a doubling of that. If you double them, you can zoom in and evolve without pixellisant.

  If you take a PNG side long 600 pixels and put on a timeline of 1080, is not going to look so good...

• Details on the implementation of shared memory to set memory_target on Oracle Linux

  Hi all.

  I have a database of Oracle 11 g Rel2 (11.2.0.4) 64-bit running on Oracle Linux 5.8 64-bit.

  Several notes on MOS, must properly configure the shared memory to make use of automatic (memory_target) memory management.

  On these notes basically to allocate memory: Mount size of t tmpfs-o shmfs = 1073741824/dev/shm

  And keep the overall starting value by adding an entry in/etc/fstab: shmfs/dev/shm tmpfs size = 1073741824 0

  My doubt is that oracle Linux uses tmpfs instead of shmfs:

  [oracle@union ~] $ df-h/dev/shm

  S.ficheros Tamaa±o Disp Uso % Montado used in

  tmpfs 7, 9G 0 7, 9G 0% / dev/shm

  [oracle@union ~] $

  [oracle@union ~] Mount $

  / dev/map/VolGroup00-LogVolroot on / type ext3 (rw)

  proc on/proc type proc (rw)

  Sysfs on/sys type sysfs (rw)

  type devpts on/dev/pts devpts (rw, gid = 5, mode = 620)

  / dev/sda1 on/U01 type ext3 (rw)

  / dev/sdb1 on / boot type ext3 (rw)

  tmpfs on/dev/SHM type tmpfs (rw)

  None on/proc/sys/fs/binfmt_misc type binfmt_misc (rw)

  sunrpc on/var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

  / dev/sdc1 on/media/respaldos type vfat (rw)

  [oracle@union ~] $

  [oracle@union ~] $ cat/etc/fstab

  / dev/VolGroup00/LogVolroot / ext3 defaults 1 1

  LABEL = / u01/U01 ext3 defaults 1 2

  LABEL = / boot/boot ext3 defaults 1 2

  tmpfs/dev/shm tmpfs defaults 0 0

  devpts/dev/pts devpts gid = 5, mode = 620 0 0

  Sysfs/sys sysfs defaults 0 0

  proc/proc proc defaults 0 0

  / dev/VolGroup00/LogVolswap swap swap defaults 0 0

  As you can see it's ride on tmpfs/dev/shm tmpfs defaults 0 0

  
  

  So the question is: is it the same? is tmpfs just a label? After all this is pointing to/dev/SHM and tmpfs.

  
  

  Best regards, Luis.
  

  I have this line in/etc/fstab on OEL 6.5 system that I use now to give me 4 GB shared memory:

  tmpfs

  / dev/shm

  tmpfs defaults, size = 4000 m

  0 0

• 11GXE on CentOS 5 64-bit VPS OpenVZ virtualization

  Hello
  I try to install 11GXE on CenOS 5 64-bit and I modified the kernel parameters
  as below

  fs.aio-max-nr = 1048576
  fs.file-max = 6815744
  kernel.shmall = 2097152
  kernel.shmmax = 4294967295
  kernel.shmmni = 4096
  kernel.sem = 250 32000 100 128
  net.ipv4.ip_local_port_range = 9000 65500

  But it is throwing

  error: permission denied on key 'fs-aio-max-nr' 
  error: permission denied on key 'fs.file-max'
  error: permission denied on key 'net.ipv4.ip_local_port_range'

  Could you please help me?
  
  Thank you
  Mehabub
  
  Published by: Sheikh Mehabub on November 18, 2012 07:38

  If you want to use MEMORY_TARGET (automatic memory management) then/dev/SHM filesystem size must be greater than or equal to the value of the MEMORY_TARGET/MEMORY_MAX_TARGET. DF h will confirm that.

  so make sure that/dev/SHM has enough space before thinking using MEMORY_TARGET.

  Or you have another choice rather than use MEMORY_TARGET use Automatic Shared Memory Management IE by manually setting the sga & pga in pfile and start the database.

  pga_aggregate_target = 100 M
  SGA_TARGET = 500M

• 11 GR 2 autonomous ASMCA Installation Fail

  Hi all

  I had to deal with this days. I perform all the steps of the installation without error, but ASMCA can end. The only mistake is to see in the newspapers which appear relevant is the following:

  OUTPUT: /u01/app/11.2.0/grid/log/ehossdb/agent/ohasd/oraagent_oragrid/oraagent_oragrid.log

  2015 08-14 22:54:30.355: [ora.asm] [2999966608] {0:0:285} [start] InstAgent::startup
  2015 08-14 22:55:02.486: TM [CLSFRAME] [3030755024] [multithreaded] evolves desired thread # 3. # Current is 2
  2015 08-14 22:55:02.502: clsdmc_respget [ora.evmd] [2991561616] {0:0:26} [check] return: status = 0, ecode = 1
  2015 08-14 22:55:02.502: [ora.evmd] [2991561616] {0:0:26} [check] DaemonAgent::check returned 0
  2015 08-14 22:55:02.502: [ora.evmd] [2991561616] {0:0:26} [check] deep check returned 1
  2015 08-14 22:55:02.503: [ora. {LISTENER.lsnr}] [2991561616] {0:0:67} [check] LsnrAgent::check
  2015 08-14 22:55:02.504: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] lsnrctl LISTENER status

  2015 08-14 22:55:02.504: [ora. GetOracleHomeAttrib LISTENER.lsnr] [2991561616] {0:0:67} [check]: oracle_home = /u01/app/11.2.0/grid
  2015 08-14 22:55:02.504: TM [CLSFRAME] [3030755024] [multithreaded] evolves desired thread # 4. # Current is 3
  2015 08-14 22:55:02.506: [ora. GetOracleHomeAttrib LISTENER.lsnr] [2991561616] {0:0:67} [check]: oracle_home = /u01/app/11.2.0/grid
  2015 08-14 22:55:02.507: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] Utils::getCrsHome crsHome /u01/app/11.2.0/grid
  2015 08-14 22:55:02.507: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] Utils::execCmd 1 USR_ORA_ENV: oracleHome:/u01/app/11.2.0/grid CrsHome:/u01/app/11.2.0/grid
  2015 08-14 22:55:02.507: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] Utils::getCrsHome crsHome /u01/app/11.2.0/grid
  2015 08-14 22:55:02.507: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] adding Environment Variables ORACLE_HOME=/u01/app/11.2.0/grid
  2015 08-14 22:55:02.507: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] adding Environment Variables TNS_ADMIN=/u01/app/11.2.0/grid/network/admin/
  2015 08-14 22:55:02.508: [ora. LISTENER.lsnr] [2991561616] {0:0:67} Utils:execCmd action [audit] = 3 flags = ohome 38 = cmdname (null) = lsnrctl.
  2015 08-14 22:55:02.508: [ora. GetOracleHomeAttrib LISTENER.lsnr] [2991561616] {0:0:67} [check]: oracle_home = /u01/app/11.2.0/grid
  2015 08-14 22:55:02.614: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) LSNRCTL for Linux: Version 11.2.0.3.0 - Production on August 14, 2015 22:55:02
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) Copyright (c) 1991, 2011, Oracle.  All rights reserved.
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) connection to (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY=EXTPROC1521)))
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) STATUS of the LISTENER
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)-)
  2015 08-14 22:55:02.615: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) Alias LISTENER
  2015 08-14 22:55:02.616: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
  2015 08-14 22:55:02.616: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) Start date August 14, 2015 21:35
  2015 08-14 22:55:02.616: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) Uptime 0 days 1 hour 20 min 2s
  2015 08-14 22:55:02.616: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) Trace level)
  2015 08-14 22:55:02.616: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) IT security: local OS authentication
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :)) OFF SNMP
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) /u01/app/11.2.0/grid/network/admin/listener.ora listener parameter file)
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) /u01/app/oracle/diag/tnslsnr/eHOSSDB/listener/alert/log.xml listener log file)
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) summary of endpoints listening...)
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))  (DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (KEY = EXTPROC1521)))
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))  (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp)(HOST=eHOSSDB) (PORT = 1521)))
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) the listener supports no service)
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :) the command completed successfully)
  2015 08-14 22:55:02.617: [ora. LISTENER.lsnr] [2991561616] {0:0:67} [check] (: CLSN00010 :))
  2015 08-14 22:55:02.618: [ora. Ret LISTENER.lsnr] [2991561616] {0:0:67} [check] execCmd = 0
  2015 08-14 22:55:02.619: [ora. Return LISTENER.lsnr] [2991561616] {0:0:67} [check] val (clsagfwret) = 0
  2015 08-14 22:55:02.619: [ora. {LsnrAgent::check LISTENER.lsnr] [2991561616] {0:0:67} [check]}
  2015 08-14 22:55:04.820: [AGFW] [3009514384] {0:0:26} Agent has received the message: AGENT_HB [engine] ID 12293:1044
  2015 08-14 22:55:06.610: clsdmc_respget [ora.evmd] [3013716880] {0:0:26} [check] return: status = 0, ecode = 1
  2015 08-14 22:55:06.610: [ora.evmd] [3013716880] {0:0:26} [check] DaemonAgent::check returned 0
  2015 08-14 22:55:06.610: [ora.evmd] [3013716880] {0:0:26} [check] deep check returned 1
  2015 08-14 22:55:32.626: Recvd [AGFW] [3030755024] asked to cast nets
  2015 08-14 22:55:32.627: TM [CLSFRAME] [3030755024] [multithreaded] evolves desired thread # 3. # Current is 4

  This bit at the end a few repetitions and repoeats and after 25 minutes it ends by the error in the file /u01/app/11.2.0/grid/log/ehossdb/alertehossdb.log below:

  [(/ u01/app/11.2.0/grid/bin/oraagent.bin(9965)] CRS-5818: Aborted command 'start' resource 'ora.asm '. Details at (: CRSAGF00113 :)) {0:0:159} to u01/app/11.2.0/grid/log/ehossdb/agent/ohasd/oraagent_oragrid/oraagent_oragrid.log.

  Nothing in the alert logs, nothing of cssd, evmd, anywhere else but cela.

  Help, please!

  Oracle 11 g 2 onto 5.11 OEL 32-bit standalone server (VirtualBox)

  Thank you

  Apologies...

  The above was not the issue nor the solution.

  The problem was that I had added a new disk device to increase the size of/dev/SHM. / Dev/sdd1 of disk has been mounted as the tmpfs and not besides the tmpfs.

  This caused ASM Oracle instance is not to be able to allocate the memory shared and halted the start of the process of bg.

  tmpfs/dev/shm defaults 0 0

  / dev/sdd1/dev/shm defaults, size = 7.5 G 0 0

  Add to the / etc/fstab and mount - a command solved the problem.

  Thank you

• Determine the parameter MEMORY_TARGET for ASM

  Nice day.

  I recently installed a 11r2 Oracle DB ("TestDB") using ASM on a virtual Linux OEL 6.4.

  The virtual machine has 30 GB of RAM allocated.

  / dev/shm = 15 GB

  When I transition to the + ASM instance, connect to SQLPLUS and check the settings, I see:

  memory_max_target          1076M
  memory_target                  1076M
  pga_aggregate_target      0
  sga_target                        0
  
  
  

  When I transition to the TestDB instance, connect to SQLPLUS and check the settings, I see:

  memory_max_target          0
  memory_target                  0
  pga_aggregate_target      1G
  sga_target                        2G
  
  
  

  1. I understand that ASM uses AMM by default and that it automatically set memory_max_target and memory_target to install. But he this calculation using it when he put at 1076M?
  2. I intend to use EAMA/HugePages for the TestDB instance (not WMA). Given that, what is the calculation I should use to set a new memory_target for the + ASM instance?

  I'm just having trouble trying to figure how much memory to allocate for the DSO to use.

  Sam as my answer above. You can use the same calculation as described below.

  "In 11.2.0.3/11.2.0.4, init.ora 'process' default settings will be" available CPU cores * 80 + 40 "." It is recommended to increase the value of memory_max_target and memory_target before moving on to 11.2.0.3/11.2.0.4(does not apply to 10 g ASM).

  Source: Oracle

• Reduce the size of VM virtual disks?

  I have a virtual machine under ESX 3.5 that has two virtual drives from 20 GB and tracks CentOS 5.3.  I would like to reduce the total size of the virtual machine to a handset of 40 GB to about 10 to 20 GB. I have a ton of free space on existing partitions.

  Here's my usage:

  1 K-blocks used available use % mounted on file system

  / dev/sdb1 20807184 5767084 13991460 30%.

  / dev/sda2 20807216 1135120 18623456 6% / show

  / dev/sda1 101086 29351 66516 31% / Boot

  tmpfs 1948132 0 1948132 0% / dev/shm

  How can I reduce these partitions, then the size of the ramdisks?

  I advise to use the free VMware Converter. This is probably the cleanest way and.

  Kind regards

  Gerrit Lehr

  If you have found this or other useful information, please consider awarding points to 'Correct' or 'useful '.

• How to Oracle point home/U01 to the new partition/dev/sdg1 or grid.vmdk?

  People,
  
  Hello. I want to install Oracle 11 g RAC 2 with 2 Virtual Machines (rac1 and rac2). The virtual disk for each virtual computer is 20 GB which is/dev/sda raw device (the partition/dev/sda1 is the same size).
  
  I want to install Oracle 11 g RAC 2 grid using facility location is: home/.../grid/runInstaller. I'm at step 4 of 8 in the wizard whose content is as follows:
  
  Base Oracle: / u01/11g_grid
  Software localization: / u01/app/grid
  Book of cluster type: ASM
  OSASM group: dba
  
  Then click on the 'next' button I got this error:
  
  '[INS-32021] enough disk space on this volume for the selected Oracle home ".
  Cause - the selected Oracle home was on a volume without enough disk space.
  Action - choose a location for Oracle home that has enough space (minimum of 3, 017 MB) or free up space on the existing volume. "
  
  I have my 'home' directory using the test command: [host ora11g@rac1] $ df k
  Its output:
  
  File system: / dev/sda1 and tmpfs
  1 K-blocks: 20,308,020 and 848 184
  Used: 18,888,968 and 0
  Available: 370 816 and 848 184
  Use: 99% and 0%
  Mounted on: / and/dev/shm
  
  
  From the information above, we saw Oracle Home/u01 is under ' / ' (a score) and it's 99% used (not enough space). I've added a new virtual hard disk (10 GB) in VM rac1 grid.vmdk whose raw device is/dev/sdg and partitioned/dev/sdg1.
  
  My question is:
  
  How to Oracle point home directory/U01 to the new partition/dev/sdg1 or grid.vmdk?
  
  Thank you.

  Hello

  like what the user did run the installer?

  Have a read of http://docs.oracle.com/cd/E11882_01/install.112/e22489/prelinux.htm#BABBIDCF for the preliminary stages of details

  It may be useful

  See you soon

• MEMORY_TARGET not supported on this system

  Hello
  
  I'm not a DBA, but during the agreement to the database for a performance test, I changed theMEMORY_TARGET to 32G using Enterprise Manager. My oracle 11g Linux database is. Then I shut down the oracle using sqlplus.
  
  But while startup, oracle launches due to error.
  
  ORA-00845: MEMORY_TARGET not supported on this system
  
  
  Now I'm stuck. Try event preforming recovery using Enterprise Manager but his failure with the similar error.
  
  RMAN-04014: failed to start: ORA-00845: MEMORY_TARGET not supported on this system
  
  
  Please suggest me how to restore this setting, and then restart the database.
  
  Thanks in advance,
  Shiv

  Hello

  This error occurs if your/dev/SHM as Linux does not have enough memory.
  by default, / dev/SHM 1/2 of your physical RAM, so I assume that your server has less than 64 GB of memory.

  Just change the entry in the/etc/fstab to use 40 G (instead of the default which is online right now), then your database should be able to start (you will need to back up/dev/shm, tmpfs resp.

  Check with df k your tmpfs has enough free space to hold the 32 GB of your database.

  Concerning
  Sebastian

• 11g R2 Memory_Target parameter

  I have an environment exadata with RDBMS version 11.2.0.1.Curently the sga and pga components were created manually...
  
  Can someone tell me what are the advantages and disadvantages of using memory_target parameter because it is available hostel 11 g and has many benefits...
  
  What is limit?
  
  database version:
  
  SQL > select * from v version $;
  
  Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64 bit Production
  PL/SQL Release 11.2.0.1.0 - Production
  CORE 11.2.0.1.0 Production
  AMT for Linux: Version 11.2.0.1.0 - Production
  NLSRTL Version 11.2.0.1.0 - Production
  
  
  The database is also OLAP and a lot of cube, operations are carried out frequently...

  I highly recommend to upgrade 11.2.0.1 to 11.2.0.2 and update servers in the cell to the latest version. Exadata (all the software of database and software of cell) is rapidly changing. More important than upgrading software custody of the cell alignment and database server.

  Unlike most important AMM (automatic memory, the memory_target parameter management) and the settings manually is AMM uses memory in/dev/shm, while manual memory management use sysV shared memory for the LMS and process private PGA memory.

  AMM is defined with a parameter, while the manual memory management requires two parameters (sga_max_size and pga_aggregate_target).

  My personal opinion is AMM is very new (so more chance of encountering situations oracle had not planned (bugs)), so I prefer to manually set. Another advantage of using sysV shared memory is that it has the ability to use huge pages, which could reduce the amount of memory allocated for pagetables substantially with many more first plans (approximately more than 200).

• memory_target in 11 GR 2

  Hi all
  
  I installed 11 GR 2 64 bits on RHEL5 64 bit.
  
  now I need to manually create the DB so need some calrification memory_target parameter in the file PFILE.
  
  questions
  
  (1) how memory_target work in 11 GR 2 and how is it related to/dev/shm mount points?
  (2) does shmmax is related co by setting MEMORY_TARGET?
  
  Details:
  
  OS: RHEL5 64-BIT
  Oracle server: 11 GR 2 64-bit
  
  memory:
  
  RAM = 32 G
  shmmax I put less than 1 MB to 4 GB as recommended by oracle.
  / dev/shm = 16G
  
  based on above entry...
  
  extent or that much, I can increase my package?
  
  given that/dev/SHM is 16 G increase the 4 G to 10 G memory_target?
  
  awaiting your response
  
  
  Thank you
  
  knockaert

  As you use a 64-bit system, setting shmmax to shared memory less than 4 GB segment does not apply. It is for 32-bit systems.

  On 64-bit systems, a practice is to set shmmax physical memory - 2 GB.

  Just to add one more thing, the more in use value for 64-bit systems here are half of physical RAM.

  concerning

  Published by: Fahd Mirza on January 21, 2011 13:00

• Win XP (Pro) - the correct virtual memory size

  Hello

  May I know what is the optimal size for the virtual memoray in MB when the Advance system setting?

  The default size of the system to the optimal size is?

  What happens when it is too beneath and above the optimum size?

  I need my PC to get the best visual effect and fast and accurate performance.

  Thank you

  Low

  No one can tell you that, without more information on your system.

  They can guess and suggest things like the committed Microsoft Support Engineer "experts":

  'Increase the value of the initial and maximum size to a higher value.

  Who has no sense at all, but it is advice from these committed Microsoft alleged Support Engineer "experts."

  Increase by 10, 100, 1000, a meelion?

  If your pagefile is out of whack, you might see something like that:

  Virtual memory minimum too low: your system is low on virtual memory.  Windows is increasing the size of your virtual memory paging file.

  This means that Windows XP is to let you know that he does his work.  The message is not an error message - this is an informational message.

  If XP thinks that the size of the swap file (usually c:\pagefile.sys) is too small to accommodate your day-to-day transactions, it will adjust the paging file to expand the pagefile and display this message as it does.  It is not necessarily a 'problem', but the message is boring.

  My notes:

  At least that learn you more about managing memory than Windows XP, it is usually best to simply let XP manage the size of your virtual memory paging file.

  To see what your current, make settings right click post work, properties, advanced, performance settings, Advanced tab, virtual memory, and then click the button change.

  Make a note of the current settings in case you need to change their return more later.

  The best setting for the size of swap file is usually going to be:

  System managed size

  Right click my computer, properties, Advanced tab, Performance... Settings, Advanced tab, virtual memory... Change.

  Note the current setting, so you can change things later if you have a problem.

  If it is already done, on the size of swap file:
  
  System managed size

  Don't forget to click on Set (to be defined), OK several times to save the settings and then restart your computer.

  Windows XP will attempt to affect a swap file approximately 1.5 times the total amount of RAM installed on your system.  To manage the size of paging file Windows XP is enough for most configurations.

  If your system is not set to the size of the managed system, you must determine how it changed and why (usually a bad reason), make a note of the current settings to change them back later if necessary, and then change the setting to the size of the managed system, click on the Set button and then click on apply to apply the changes (you will be asked to restart).

  "Because someone told me to" is not a good reason to start making adjustments to the size of pagefile.  Setting just above to enlarge it by an arbitrary value can ease the symptoms of the problem and stop message, but may not result in the best configuration for your system.

  All the advice to 'Increase the value of the initial and maximum size to a higher value' are misinformed ideas that come from not knowing how to work XP - How do you increase it and what happens if you increase too?

  If you want your system to operate as efficiently as possible, you must understand what is happening and fix it properly and not only begin to try things or make some arbitrary adjustments.

  The size of the pagefile can really need adjustment, but you should at least try to know what you're doing and why you need to do.  It is unlikely that anyone can tell you how to adjust your settings properly without more information.

  If you don't know what are the best settings, or if you are not sure what should be your settings and need help looking at your stuff, follow these steps:

  Click Start, run and enter in the box:

  Msinfo32

  Click OK, and when the system info summary appears, click on edit, select all (Ctrl-A), copy (Ctrl-C) and paste (Ctrl-V) the information back here in your next reply.

  There will be some personal information (such as the user name and the name of the system), and what appears to be personal information for you, simply delete the personal information of the pasted information.

  This minimize back Q & A and eliminate the guesswork and assumptions.

• XP paging file: location Optimum of performance?

  The swap file.  Few people understand this, including me.  I thought I would post some queries is that the performance of the hard drive therefore changed radically in the past because of disks SSD (SSD).

  Optimum size: currently the size by default is the same as the amount of ram I (2 GB 800 mhz DDR2).  This is the best?

  Location: if I use a SSD (not a high-performance one), or on C with the operating system on another harddrive even if slower sound (7200 RPM Sata)?

  Best performance: what about using separate SSD just for the pagefile?  How did benefit things?

  RAM disk: is it possible to put the pagefile on a ram drive?  (I know nothing about ram disks except that they are supposed to be very fast).

  Youre best bet is to 'let system set it up', however, this is only a partial-

  optimization. Intel says 'disable paging Executive' in regedit, this means that

  the operating system to use more ram instead of the HD, that makes the presence, because the RAM

  is faster than paging for a HD... Whatever it is, read more on: http://technet.microsoft.com/en-us/

  Library/cc75129.aspx

  Or read kb555223

• What size for the system restore?

  What is the size of the file system restore should ideally be? I see things all over the Internet saying the default size is 12% of your hard drive, but no one says what is the optimum size.

  Thank you.

  About 1500 MB works. If you have a huge hard drive, you will not be able to get that small. In this case only set it to 1 or 2%. MS - MVP - Elephant Boy computers - don't panic!