Sga size limits

Hi all,
Is there a metalink note or oracle list of the SGA size limits on the different platforms and 32/64bit?

Not sure that there is such documents on My Oracle Support. However TECH: Unix Semaphores and Shared Memory Explained (Doc ID 15566.1) explains how Oracle is using Unix/Linux shared memory segments.
Generally speaking I would say that maximum sga size is not an Oracle limit but an OS limit: on Unix it depends on SHMxxx kernel parameters and on Windows I don't know as Oracle architecture is quite different from Unix (a single but multithreaded process using "normal" memory).
See also: Oracle® Database Administrator's Reference 11g Release 2 (11.2) for Linux and UNIX-Based Operating Systems
for AIX and Solaris:
http://download.oracle.com/docs/cd/E11882_01/server.112/e10839/tuning.htm#BABBDBDE
http://download.oracle.com/docs/cd/E11882_01/server.112/e10839/appe_sol.htm#UNXAR344
Edited by: P. Forstmann on 20 mai 2011 11:52

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1.-
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I will preface this by saying that this is probably a stupid question. I am pretty much an Oracle newbie, but I'm constantly trying to learn stuff. I have done a lot of reading on this topic, so I definitely have my own opinion, but everybody in my office thinks I'm crazy. So here goes...
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So, am I crazy or not?

Sam, if everyone else in the office thinks you are crazy then you probably are; however, that does not mean that you are not correct in your argument.
The total amount of memory on the machine is not really a good factor for setting your SGA size. It is a limitation. The SGA size should be set based on the application load. Nevertheless the odds are good that doubling the SGA would have a measurable benefit since your machine has so much spare resource available.
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Remember that your applicaiton will also need PGA and it is easy for the PGA requirements to equal or exceed the SGA requirements. At some point it may also be necessary to add another database instance (and SGA) to the machine so just because you have the memory does not mean that all of it should be put to immediate use.
HTH -- Mark D Powell --

Need to Increase SGA Size

Hi,
RDBMS : 11.1.0.7.0
OS : RHEL 5 (X86_64)
EBS : 12.1.3
My Database Server RAM size is 128 gb
Currently my Parameters are
SGA_Target = 2g
SGA_max = 2g
Shared_pool_size = 600m
Kernel Parameters are :
kernel.msgmnb = 65536
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My question is...
As My project manager is asking to increase the SGA Size as i have 128gb RAM of server.
Maximum how much i can increase the SGA Size
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Please advice..
Thanks,

As per the Note
Maximum SHMMAX values for Linux x86 and x86-64 [ID 567506.1]
=======================================================================
QUESTION 2
===========
What is the maximum value of SHMMAX for a 64-bit (x86-64) Linux system?
ANSWER 2
===========
Oracle Global Customer Support officially recommends a " maximum" for SHMMAX of "1/2 of physical RAM".
The maximum size of a shared memory segment is limited by the size of the available user address space. On 64-bit systems, this is a theoretical 2^64bytes. So the "theoretical limit" for SHMMAX is the amount of physical RAM that you have. However, to actually attempt to use such a value could potentially lead to a situation where no system memory is available for anything else. Therefore a more realistic "physical limit" for SHMMAX would probably be "physical RAM - 2Gb".
In an Oracle RDBMS application, this "physical limit" still leaves inadequate system memory for other necessary functions. Therefore, the common "Oracle maximum" for SHMMAX that you will often see is "1/2 of physical RAM". Many Oracle customers chose a higher fraction, at their discretion.
Occasionally, Customers may erroneously think that that setting the SHMMAX as recommended in this NOTE limits the total SGA. That is not true. Setting the SHMMAX as recommended only causes a few more âshared memory segmentsâ to be used for whatever total SGA that you subsequently configure in Oracle. For additional detail, please see Document 15566.1, "SGA, SHMMAX, Semaphores and Shared Memory Explained"
==========================================================================
Our server RAM is 128 gb.... as per the note 1/2 of the physical RAM we can assign for SHMMAX parameter... (apprx 60gb)
How can i understood this answer for my configuration......
Please advice...
Thanks,

I want SGA size=4GB when RAM size=8GB.

Hello,
If i am not wrong, oracle takes the 40% of RAM size by default for SGA. At one of my clients site server, they have 8 GB RAM , now i wanted to a lot them at least 3GB to 4GB RAM for SGA. As i tried to do so , it was not taking more than 2GB ...
Why oracle does not take SGA size more than 2GB ? how can this be increased ? can someone please put some light on this point.
ORACLE 10G R2
Windows Server 2005
Thanks and Regards,

Hello,
In Windows *32 bit* you are limited to *2GB* per process (whatever the process). So the Process oracle.exe
cannot overcome this limit except if you use the */3GB* parameter.
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Please find enclosed a link about this topic:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:707585800346136316
Hope this help.
Best regards,
Jean-Valentin
Edited by: Lubiez Jean-Valentin on Mar 26, 2010 10:04 PM

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Hello David,
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[5]>
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[5242880]>
<...>
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#550 5.3.4
ROUTING.SizeLimit; message size exceeds fixed maximum size for route ##
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AnonymousSenderToRecipientRatePerHour                       : 1800
ClearCategories
: True
ConvertDisclaimerWrapperToEml                               : False
DSNConversionMode
: UseExchangeDSNs
ExternalDelayDsnEnabled                                     : True
ExternalDsnDefaultLanguage                                  :
ExternalDsnLanguageDetectionEnabled                         : True
ExternalDsnMaxMessageAttachSize                             : 100 MB (104,857,600 bytes)
ExternalDsnReportingAuthority                               :
ExternalDsnSendHtml
: True
ExternalPostmasterAddress                                   :
GenerateCopyOfDSNFor                                        :
HygieneSuite
: Standard
InternalDelayDsnEnabled                                     : True
InternalDsnDefaultLanguage                                  :
InternalDsnLanguageDetectionEnabled                         : True
InternalDsnMaxMessageAttachSize                             : 100 MB (104,857,600 bytes)
InternalDsnReportingAuthority                               :
InternalDsnSendHtml
: True
InternalSMTPServers
JournalingReportNdrTo                                       : <>
LegacyJournalingMigrationEnabled                            : False
LegacyArchiveJournalingEnabled                              : False
LegacyArchiveLiveJournalingEnabled                          : False
RedirectUnprovisionedUserMessagesForLegacyArchiveJournaling : False
RedirectDLMessagesForLegacyArchiveJournaling                : False
MaxDumpsterSizePerDatabase                                  : 18 MB (18,874,368 bytes)
MaxDumpsterTime
: 7.00:00:00
MaxReceiveSize
: 100 MB (104,857,600 bytes)
MaxRecipientEnvelopeLimit                                   : 500
MaxRetriesForLocalSiteShadow                                : 2
MaxRetriesForRemoteSiteShadow                               : 4
MaxSendSize
: 100 MB (104,857,600 bytes)
MigrationEnabled
: False
OpenDomainRoutingEnabled                                    : False
RejectMessageOnShadowFailure                                : False
Rfc2231EncodingEnabled                                      : False
SafetyNetHoldTime
: 2.00:00:00
ShadowHeartbeatFrequency                                    : 00:02:00
ShadowMessageAutoDiscardInterval                            : 2.00:00:00
ShadowMessagePreferenceSetting                              : PreferRemote
ShadowRedundancyEnabled                                     : True
ShadowResubmitTimeSpan                                      : 03:00:00
SupervisionTags
: {Reject, Allow}
TLSReceiveDomainSecureList                                  : {}
TLSSendDomainSecureList                                     : {}
VerifySecureSubmitEnabled                                   : False
VoicemailJournalingEnabled                                  : True
HeaderPromotionModeSetting                                  : NoCreate
Xexch50Enabled
: True

Hello Landfish,
Good Day...
The output gives the information that Size limit set for Receive and Send is 100 mb, but setting could have changed. So you can follow the below steps to resolve the issue.
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get-transportconfig | ft maxsendsize, maxreceivesize
get-receiveconnector | ft name, maxmessagesize
get-sendconnector | ft name, maxmessagesize
get-mailbox Administrator |ft Name, Maxsendsize, maxreceivesize
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Set-TransportConfig -MaxSendSize 200MB -MaxReceiveSize 500MB (Size is based on your requirement)
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For More info
https://technet.microsoft.com/en-us/library/bb124708(v=exchg.150).aspx
Remember to mark as helpful if you find my contribution useful or as an answer if it does answer your question.That will encourage me - and others - to take time out to help you Check out my latest blog posts @ Techrid.com

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yes sir,
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Insanity is hereditary, you get it from your children
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String mapFile = "C:/temp/" + UUID.randomUUID().toString() + ".tmp";
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catch( Exception e )
e.printStackTrace();
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Thanks in advance for any input.
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See the workaround in http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4724038

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Hi,
BPEL can not process more than 7 MB size xml structred file. but,debatching will work for xml files also provided if the file has repeated multiple structures (means multiple repeated root elements).
Regards,
Dhanumjay

Increasing Email Size Limits for some users

Hi All,
For some users (management) i needed to arrange that they are able to send bigger files then the default 10MB limit to each other.
I used this procedure to do so,
https://www.simple-talk.com/sysadmin/exchange/increasing-email-size-limits-for-your-high-profile-users-in-exchange-2010/
In a nutshell:
Set Global Transport Org. Config to 200MB
Set Transport Send and Receive connector to 200MB
Created a Distribution group adding the MT members and me (for testing)
Created a transport Rule for the 10MB limit for all users and exception for the distribution group
(Believe me, i am not happy with the 200MB size limit)
All seems to work but i have one issue that i cannot tackel or maybe it is by design.
-Managemant can also send big files to all
users who do not have this privelige, this is not someting i want, sending 100MB+ attachments to over 150 users.
Is this by design or do i mis something?
Thanks,
Ron

Hi RonGielgens,
Attachment size in exchange has to be set on
Global settings
Connectors (send and receive connectors)
Mailbox
The global settings will affect all the others. of course connectors will affect specific servers and mailbox one user. You have to set the global to the absolute max size you want to allow in your organization.
after you do this you will need either to set the 10MB on each mailbox
Get-Mailbox | Set-Mailbox -MaxSendSize 10MB -MaxReceiveSize 10MB
Then change the limit on specific mailbox
or another way is to create a transport rule that will reject the email if the attachment size it > 10MB unless the sender/recipient is the required user or group.
so basically create 2 transport rules
1. reject messages sent to anyone with attachment > 10mb unless the recipient is userX
2. reject messages sent from anyone with attachment > 10mb unless the sender is userX
Normal case it should not allow.
Thanks, MAS
Please mark as helpful if you find my comment helpful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

PDF file size limited to graphics memory in Reader?

I've created a form (in LiveCycleDS) that allows for an unlimited number of photos to be loaded into it. I put an image into a subform that is duplicated every time a user clicks a button thus creating an unlimited number of images that can hold photos. I then extended it with Reader Extensions.
I'm running into a problem when I try to load a large number of photos into the form. It gets to about 47MB of images when it locks-up Adobe reader. I've been able to bring up other applications after the lock-up and when I switch back to Reader the artifacts of the other application are then displayed within Reader.
What is the practical limit to the size of a file created with LiveCycle? Is it tied to the amount of graphics memory a computer has? My machine has 2GB of RAM while my video card has only 384MB. I haven't been able to figure out if there is a file size limitation.

It's entirely normal for file size to increase. PDFs are much more compressed than print streams. For some printers the print size is almost constant (a huge bitmap), for others, it's a collection of graphical items and the size varies enormously. Rarely anything you can do.

How to Increase the SGA Size.

Hi Guru's
I want to Know
How to Increase the SGA Size in Database 8.1.7.4.1
My Ram Size is 6 GB
When I query the Below Script
select name, value
from v$parameter
where name in ('shared_pool_size', 'java_pool_size', 'streams_pool_size',
'log_buffer', 'db_cache_size', 'db_2k_cache_size', 'db_4k_cache_size',
'db_8k_cache_size', 'db_16k_cache_size', 'db_32k_cache_size',
'db_keep_cache_size', 'db_recycle_cache_size', 'large_pool_size');
Result
shared_pool_size     300000000
large_pool_size     0
java_pool_size     50000000
log_buffer     10485760
Please Suggest Me the How Much Value also to increase the SGA
My RAM SIZE is 6 GB
Regards
***SBJ***

SGA size on 8i is static , and for increasing the size you have to make the changes in the pfile and bounce the database
First thumb rule is that your SGA should not exceed more than 40% of your PHYSICAL RAM in oracle <= 8i version. You can go around 80% from oracle 9i onwards
http://mohamedazar.wordpress.com/2010/08/30/can-i-increase-sga-target-size-greater-than-sga-max-size/
Edited by: Amigo on Dec 18, 2010 1:31 AM

Sga size limits

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