Bridge Memory Management

Have been using Bridge for ages but ran across a problem this morning I had not seen before.
Creating some web galleries for a couple of customers I used Bridge to Create a Flash Gallery and then posted on my web site. All worked just fine and with only 16 images creating the gallery was about 30 seconds. Then went back to the "Essentials View". Went back into Photoshop CS6 to work on some images for another upload, and Photshop was running really slow. Normally on my Win 7 x64 system (16GB) RAM it runs really well. Fired up task Manager and saw that Bridge was consuming just over a GB of memory. Closed Bridge, opened Bridge again, used Bridge to open images in ACR then into Photoshop. Bridge at 250 GB and system running fine. Created another Web Gallery and Bridge up to a GB again. Finished and went back to Essentials view - Bridge not giving back any memory. Now this was with 16 images - gets worse when you create a gallery of say 200 images.
Now I know Bridge is somewhat of an Orphan but is there any need to hold onto the memory -as even with my somewhat beefy system I have to close and reopen Bridge to bring performance back.
Cheers
Mike
PS Running the latest versionsof Bridge and Photoshop and ACR 7.3 that are available for a non-cloud user

I have only used Web Galleries from Bridge a few times before - but I think I have narrowed down the cause. If I just create the Gallery resources look normal - but if I hit preview the memory allocation goes up - so could be caching the whole Gallery - but would have thought that it would have released it once the browser was closed - looks like Bridge does not look for close of the preview so hold onto everything.
Have to admit that the Web Gallery feature works well to get images onto a site in a hurry for a client to preview - and email me back with the final images they want. Now to brush up on my XML & HTML to add in a few instructions and add a link to direct them back to my home page
Happy New Year
Mike

Similar Messages

What is difference between 32 bit and 64 bit sql server memory management

What is difference between 32 bit and 64 bit sql server memory management
Thanks
Shashikala

This is the basic difference...check if helps:
A 32-bit CPU running 32-bit software (also known as the x86 platform) is so named because it is based on an architecture that can manipulate values that are up to 32 bits in length. This means that a 32-bit memory pointer can store a value between 0 and
4,294,967,295 to reference a memory address. This equates to a maximum addressable space of 4GB on 32-bit platforms
On the other hand 64-bit limit of 18,446,744,073,709,551,616, this number is so large that in memory/storage terminology it equates to 16 exabytes. You don’t come across that term very often, so to help understand the scale, here is the value converted to
more commonly used measurements: 16 exabytes = 16,777,216 petabytes (16 million PB)➤ 17,179,869,184 terabytes (17 billion TB)➤ 17,592,186,044,416 gigabytes (17 trillion GB)➤
As you can see, it is signiﬁcantly larger than the 4GB virtual address space usable in 32-bit systems; it’s so large in fact that any hardware capable of using it all is sadly restricted to the realm of science ﬁction. Because of this, processor manufacturers
decided to only implement a 44-bit address bus, which provides a virtual address space on 64-bit systems of 16TB. This was regarded as being more than enough address space for the foreseeable future and logically it’s split into an 8TB range for user mode
and 8TB for kernel mode. Each 64-bit process running on an x64 platform will be able to address up to 8TB of VAS.
Please click the Mark as answer button and vote as helpful if this reply solves your problem

Questions about db_keep_cache_size and Automatic Shared Memory Management

Hello all,
I'm coming upon a server that I'm needing to pin a table and some objects in, per the recommendations of an application support call.
Looking at the database, which is a 5 node RAC cluster (11gr2), I'm looking to see how things are laid out:
SQL> select name, value, value/1024/1024 value_MB from v$parameter
2 where name in ('db_cache_size','db_keep_cache_size','db_recycle_cache_size','shared_pool_size','sga_max_size');
NAME VALUE VALUE_MB
sga_max_size 1694498816 1616
shared_pool_size 0 0
db_cache_size 0 0
db_keep_cache_size 0 0
db_recycle_cache_siz 0 0
e
Looking at granularity level:
SQL> select granule_size/value from v$sga_dynamic_components, v$parameter where name = 'db_block_size' and component like 'KEEP%';
GRANULE_SIZE/VALUE
2048
Then....I looked, and I thought this instance was set up with Auto Shared Mem Mgmt....but I see that sga_target size is not set:
SQL> show parameter sga
NAME TYPE VALUE
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 1616M
sga_target big integer 0
So, I'm wondering first of all...would it be a good idea to switch to Automatic Shared Memory Management? If so, is this as simple as altering system set sga_target =...? Again, this is on a RAC system, is there a different way to do this than on a single instance?
If that isn't the way to go...let me continue with the table size, etc....
The table I need to pin is:
SQL> select sum (blocks) from all_tables where table_name = 'MYTABLE' and owner = 'MYOWNER';
SUM(BLOCKS)
4858
And block size is:
SQL> show parameter block_size
NAME TYPE VALUE
db_block_size integer 8192
So, the space I'll need in memory for pinning this is:
4858 * 8192 /1024/1024 = 37.95.......which is well below my granularity mark of 2048
So, would this be as easy as setting db_keep_cache_size = 2048 with an alter system call? Do I need to set db_cache_size first? What do I set that to?
Thanks in advance for any suggestions and links to info on this.
cayenne
Edited by: cayenne on Mar 27, 2013 10:14 AM
Edited by: cayenne on Mar 27, 2013 10:15 AM

JohnWatson wrote:
This is what you need,alter system set db_keep_cache_size=40M;I do not understand the arithmetic you do here,select granule_size/value from v$sga_dynamic_components, v$parameter where name = 'db_block_size' and component like 'KEEP%';it shows you the number of buffers per granule, which I would not think has any meaning.I'd been looking at some different sites studying this, and what I got from that, was that this granularity gave you the minimum you could set the db_keep_cache_size, that if you tried setting it below this value, it would be bumped up to it, and also, that each bump you gave the keep_cache, would be in increments of the granularity number....?
Thanks,
cayenne

Error code kernel data inpage , memory management , 0xc000021a , 0xc00000e9 on windows 8

Hi everyone I am sahasvat.I am using Acer aspire 5755. It's specification are Intel i3 3rd gen processor, 2Gb DDR 3 ram and 500 GB hdd.I am running on windows 8 OS. I opened about 4 tabs on google chrome and suddenly a blue screen with sad face displayed
an error kernel data inpage and it got restarted and after 5 mins I opened google chrome and again blue screen came and displayed an another error memory management and while restarting on bios I pressed f8 and booted to safe mode as normal
mode didn't open.soon after 20 mins I restarted my lap and I received an error 0xc000021a bios and windows booted.i then pressed power button for a min and switched on my pc but it showed a different error 0xc00000e9. I restarted many times
either 0xc000021a or 0xc00000e9 used to come not an fixed error. I don't have my cd as it got scratches on CD. Plzz help me to get out of this problem.
I can't even access my laptop and I am using my windows phone to post this.

Hi everyone I am sahasvat.I am using Acer aspire 5755. It's specification are Intel i3 3rd gen processor, 2Gb DDR 3 ram and 500 GB hdd.I am running on windows 8 OS. I opened about 4 tabs on google chrome and suddenly a blue screen with sad face displayed
an error kernel data inpage and it got restarted and after 5 mins I opened google chrome and again blue screen came and displayed an another error memory management and while restarting on bios I pressed f8 and booted to safe mode as normal
mode didn't open.soon after 20 mins I restarted my lap and I received an error 0xc000021a bios and windows booted.i then pressed power button for a min and switched on my pc but it showed a different error 0xc00000e9. I restarted many times
either 0xc000021a or 0xc00000e9 used to come not an fixed error. I don't have my cd as it got scratches on CD. Plzz help me to get out of this problem.
I can't even access my laptop and I am using my windows phone to post this.

Blue Screen of Death - Memory Management

I have gotten the blue screen of death twice now. The screen went by really fast but I think it said something about memory, like memory management. I copied the problem details:
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 4105
Additional information about the problem:
BCCode: 1a
BCP1: 0000000000041790
BCP2: FFFFFA80022B8DF0
BCP3: 000000000000FFFF
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1
Files that help describe the problem:
C:\Windows\Minidump\071314-34335-01.dmp
C:\Users\Tiffany Jiang\AppData\Local\Temp\WER-53804-0.sysdata.xml
Both times happened randomly and about 2 weeks apart, and the laptop (Toshiba Satellite; it was bought brand new about only 3 weeks ago) still works fine after it restarts, but I don't want it to keep happening. I also don't know what the problem is. I used my previous Windows 7 laptop (HP pavillion g6) the same way for 3 years and it never blue screened even once. I tried going to the Toshiba support website to see if I need to download any new drivers but the website does not seem to be working on my laptop, everytime I go on it it's just lines of letter and numbers.
Help would be much appreciated, thank you!

Satellite C55-A5195
Downloads here.
Bug Check 0x19: BAD_POOL_HEADER
Caused By Driver : vsdatant.sys              <- True Vector device driver
You have ZoneAlarm on board? If so, uninstall it and see what happens.
==================================================
Dump File         : 071314-34335-01.dmp
Crash Time        : 7/15/2014 9:58:18 AM
Bug Check String : MEMORY_MANAGEMENT
Bug Check Code    : 0x0000001a
Parameter 1       : 00000000`00041790
Parameter 2       : fffffa80`022b8df0
Parameter 3       : 00000000`0000ffff
Parameter 4       : 00000000`00000000
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+75bc0
File Description :
Product Name      :
Company           :
File Version      :
Processor         : x64
Computer Name     :
Full Path         : C:\Test\071314-34335-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 7601
==================================================
==================================================
Dump File         : 070514-42837-01.dmp
Crash Time        : 7/15/2014 9:58:18 AM
Bug Check String : BAD_POOL_HEADER
Bug Check Code    : 0x00000019
Parameter 1       : 00000000`00000020
Parameter 2       : fffffa80`0b390140
Parameter 3       : fffffa80`0b390160
Parameter 4       : 00000000`04020008
Caused By Driver : vsdatant.sys
Caused By Address : vsdatant.sys+47054
File Description :
Product Name      :
Company           :
File Version      :
Processor         : x64
Computer Name     :
Full Path         : C:\Test\070514-42837-01.dmp
Processors Count : 4
Major Version     : 15
Minor Version     : 7601
==================================================
-Jerry

OSX inactive memory management problems

On my 2010 Macbook Air 11" running OSX 10.8 Mountain Lion, I have run into some major issues with memory management. This problem persists across both my Mac machines and multiple generations of OSX. I have a 2007 2.2 Ghz Core 2 Duo Macbook Pro Running Lion (upgraded from Tiger) with 3 gb 667Mhz DDR2 RAM and my 2010 Air 1.4Ghz Core 2 Duo (Upgraded from Snow Leopard to Mountain Lion) with 2gb 1067mhz DDR3 RAM. On both machines, for some time now, during normal usage; especially web browsing using Chrome and Safari (respectively); the inactive RAM on both machines will grow to consume around 30% of all RAM and force time consuming page outs to the mass storage drives on both machines. The Pro has a slower hard drive and the problem is the worst here, the air has a much faster SSD. I have found myself constantly having a window of Activity Monitor up on at least one of my desktops watching my RAM usage, using terminal to purge ram upwards of 10 times an hour to prevent costly page outs, especially on the Pro. I know Apple claims that inactive RAM is essentially free RAM that is temporarily storing recently used information for ease of access later and that it's supposed to be released as free memory when needed, but this obviously is not happening. Right now on my air my swap file is over 650Mb and I've seen it top 2Gb before. The air is exponentially better than the Pro due to the faster SSD, but I do notice substantial UI lag and a massive drop in fluidity as soon as my meager 2Gb is full and I start paging. The Pro is another story entirely, the entire system will essentially become unusable, having to wait several seconds for mouse clicks to even register. That's why I upgraded the stock 2Gb of RAM it comes with to 3Gb hoping that a 150% increase in RAM would help, but it just prolonged the inevitable. I still end up paging out just as bad across both systems if un checked. Even when I keep a close eye on memory usage and purge often, I still end up paging out because I'm not vigilant enough.
I have to limit my browsing to less than 5 tabs and keep my number of open programs less than 2 on both machines. My active and wired memory rarely seem to top 70%, meaning the rest gets taken by inactive, which isn't functioning as Apple claims. Even if my conclusions aobut what is happening under the hood are incorrect, something is going terribly wrong. I can't upgrade the RAM on my Air at all, and the RAM on my Pro is capped at 4Gb. I'm holding on upgrading because I don't think the excess hardware will solve this software memory problem. Whatever is happening is causing a serious drop in performance for me (yes I do know I have underpowered machines), but there has to be something I can do to speed performance. I've read about disabling the dynamic page file entirely, which just seems to crash the system when free memory is gone, and I've read about programs that claim to free memory. Those programs seem to work by taking a high priority in the process heigharchy of the OS and then proceeding to eat up large portions of RAM and releasing them as needed in an attempt to replicate the true intentions of inactive RAM, but I've heard of problems with this method as well. Does anyone have a viable solution? Monitoring my RAM usage myself and ensuring I don't end up paging out is costly, time consuming, annoying, and inefficient since I fail to catch the problem before I page if I get particularly busy. There is no other OS I've ever been acquainted with that has this problem, not any flavor of Linux, not even the dreaded windows. I seriously hope Apple can do something to manage this runaway memory problem. I'd like to be able to open more than 3 windows in Safari. I've had to purge 3 seperate times while writing this on my Air, and I now have 678 inactive memory, 741 inactive, 582 wired, and less than 14Mb free out of 2Gb with a growing swap at 680Mb. Each purge becomes less and less effective and the last one I did freed up only about 100Mb and it got eaten up again by inactive in less than 10 seconds. On my Air, the memory hog is Safari right now at 700Mb between the web content and flash player with only Facebook, youtube, and this Apple Supprt tab open. I have NO other applications running in the fore or background other than Activity Monitor and Terminal. On my Pro the memory hog is always kernel task, I use Chrome and Safari both. While the memory used by the browser does not usually take up the most substantial portion of the total used RAM out of any process, the more tabs I open, the more RAM I use. The browser is usually the second heaviest RAM hog to Kernel Task. So it seems that across the two machines there are two lsightly different manifestations of the same problem with the same results: massive performance drops and extremely annoying and costly page outs no matter the reason. I just want this problem to go away. I've used underpowered windows laptops that can open a dozen tabs in a heavier browser like IE or Firefox while using other programs like Word or Excel and more with no memory lag issues. There's no way in **** I could manage to open that many pages in a browser while using Pages and/or Numbers on either of my machines and expect reliable (swap free performance). This is just kind of sad in my opinion. Does anyone have a way to get my OSX machine running smooth so that I can remove the one thing that windows and Linux fan boys get the right to laugh at my Macs for?

Hi Zephryl,
I was actually able to get an initial response from Sun on this a few months ago. However, the Sun Swing team has not followed up on a resolution for this pervasive problem, even though they noticed the same problem when running a test applet I had created for them. Apparently, I.E. is not releasing memory from the heap.
Below is a quote from a Sun rep. on this in an e-mail sent to me on Dec 4, 2002:
"I suspected the leak is in the native code because the # of handles and GDI objects keep increasing but no obvious Java objects are left behind in the Java heap during page switch."
So, until Sun and/or Microsoft work out a solution to this, anyone who uses I.E. 6 and applets for their UI seems to be in a lot of trouble.
As a note, trying to invoke the Garbage Collector does not do anything, but generally a very small amount of memory will be released (like maybe 5-10% of the memory allocated for the applet).
Cheers!
Avi Gray
Global Computer Enterprises

Memory Management Error in Windows 8.1

please check dumpfile in this url related to memory management error in windows 8.1. This error usually occurs when i open window media player....thanks
https://skydrive.live.com/redir?resid=99B960292878F11C%21148

These crashes were related to memory management (probably caused by a driver).
Please run these tests to verify your memory and find which driver is causing the problem.
If you are overclocking (pushing the components beyond their design) you should revert to default at least until the crashing is solved. If you don't
know what it is you probably are not overclocking.
1-Memtest. (You can read more about running memtest here)
2-Driver verifier (for complete directions see our wiki here)
Co-Authored by JMH3143
Wanikiya and Dyami--Team Zigzag

Bridge cache managment & export to folders?

What is the function and advantage of "auto exporting cache to folders" in Bridge?
Round 2 testing, I changed the CS6 Bridge cache location to be the same location I was using for CS5, on a secondary drive.
Small mistake, because CS6 proceeded to delete the entire existing cache and start building a new one. However, Bridge CS5 seems to coexist OK sharing the same cache with CS6. They are both re-building the cache as I visit individual folders. (30,000 files in 800 folders gonna take a while).
Long ago under CS3 I adopted the strategy of setting Bridge to "Auto export cache to folders." That worked well, because if you purged the master cache, Bridge would very quickly rebuild it from the folder cache files each time you re-visited a folder. The thumbs would come up very quickly if a folder cache existed, much slower if no folder cache existed.
Under CS5, and now CS6, that is no longer true. If you visit a folder after the cache has been purged, a slow process to generate thumbnails occurs. It appears that the individual folder cache is not being used for anything. The time to re-build the cache is about the same, regardless of whether folder cache files exist or not.
Purging or deleting the Bridge cache was often necessary under CS3 because the cache often became corrupted. CS5 was more stable, but still not immune from cache corruption. Maybe CS6 will be even more stable, but I'm betting cache purges will still be sometimes necessary. Is there any way to make the rebuild faster? Or more generally, what's the best strategy for Bridge cache management?
(And no, I don't have "keep 100% previews in cache" selected.)

What is the function and advantage of the Bridge Forum?
http://forums.adobe.com/community/bridge/general

RE: (forte-users) memory management

Brenda,
When a partition starts, it reserves the MinimumAllocation. Within this
memory space, objects are created and more and more of this memory is
actually used. When objects are no longer referenced, they remain in memory
and the space they occupy remains unusable.
When the amount of free memory drops below a certain point, the garbage
collector kicks in, which will free the space occopied by all objects that
are no longer referenced.
If garbage collecting can't free enough memory to hold the additional data
loaded into memory, then the partition will request another block of memory,
equal to the IncrementAllocation size. The partition will try to stay within
this new boundary by garbage collecting everytime the available part of this
memory drops below a certain point. If the partition can't free enough
memory, it will again request another block of memory.
This process repeats itself until the partition reaches MaximumAllocation.
If that amount of memory still isn't enough, then the partition crashes.
Instrument ActivePages shows the memory reserved by the partition.
AllocatedPages shows the part of that memory actually used.
AvailablePages shows the part ot that memory which is free.
Note that once memory is requested from the operating system, it's never
released again. Within this memory owned by the partition, the part actually
used will always be smaller. But this part will increase steadily, until the
garbage collecter is started and a part of it is freed again.
There are some settings that determine when the garbage collector is
started, but I'm not sure which ones they are.
The garbage collector can be started from TOOL using
"task.Part.OperatingSystem.RecoverMemory()", but I'm not sure if that will
always actually start the garbage collector.
If you track AllocatedPages of a partition, it's always growing, even if the
partition isn't doing anything. I don't know why.
If you add AllocatedPages and AvailablePages, you shoud get the value of
ActivePages, but you won't. You always get a lower number and sometimes even
considerably lower. I don't know why.
Pascal Rottier
Atos Origin Nederland (BAS/West End User Computing)
Tel. +31 (0)10-2661223
Fax. +31 (0)10-2661199
E-mail: Pascal.Rottiernl.origin-it.com
++++++++++++++++++++++++++++
Philip Morris (Afd. MIS)
Tel. +31 (0)164-295149
Fax. +31 (0)164-294444
E-mail: Rottier.Pascalpmintl.ch
-----Original Message-----
From: Brenda Cumming [mailto:brenda_cummingtranscanada.com]
Sent: Tuesday, January 23, 2001 6:40 PM
To: Forte User group
Subject: (forte-users) memory management
I have been reading up on memory management and the
OperatingSystemAgent, and could use some clarification...
When a partition is brought online, is the ActivePages value set to the
MinimumAllocation value, and expanded as required?
And what is the difference between the ExpandAtPercent and
ContractAtPercent functions?
Thanks in advance,
Brenda
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

The Forte runtime is millions of lines of compiled C++ code, packaged into
shared libraries (DLL's) which are a number of megabytes in size. The
space is taken by the application binary, plus the loaded DLL's, plus
whatever the current size of garbage collected memory is.
Forte allocates a garbage-collected heap that must be bigger than the size
of the allocated objects. So if you start with an 8MB heap, you will always
have at least 8MB allocated, no matter what objects you actually
instantiate. See "Memory Issues" in the Forte System Management Guide.
-tdc
Tom Childers
iPlanet Integration Server Engineering
At 10:37 PM 6/11/01 +0200, [email protected] wrote:
Hi all,
I was wondering if anyone had any experience in deploying clients on NT
concerning
the memory use of these client apps.
What is the influence of the various compiler options (optimum
performance, memory use etc)?
We seem to see a lot of the memory is taken by the Forte client apps (seen
in the Task Manager
of NT) in respect to the other native Window apps. For example an
executable of approx 4Mb takes up to
15Mb of memory. When I look at the objects retained in memory after
garbage collection, these are about
2Mb. Where do the other Mb's come from?

Java Memory Management/Out of Memory

Hi Guys,
I have a few questions about java memory management
Because i keep encounter a lot of out of memory error which i think java does not handle Vector/ArrayList re initialisation automatically
Asumme i have 2 million record in database and , i will process every 80000 and store it in Vector
while(true)
list = new Vector();
list = GetResultFromDatabase() // Process Every 80000
if list.size() > 0 =======> My VEctor list contain 80000
//loop the 800000
//Process Some logic and data
list.clear();
list = null;
If u See , i need to call list.clear and list = Null every process so it wont cause me out of memory
Before i put that 2 lines , i always hit out of memory Exception.
Seems like garbage collector cannot claim memory if i dont declare
Is Memory Occupied by VEctor cannot be recoverable if we dont explitcitynya clear it and set it to NULL??
Because in term of logic wise it wont cause a problem if i just
do in this statement after it process like below
list = new Vector() which will reinstatiate the object.
Thanks.

Damm i should hacve read your post again
Look here:
while(true)
list = new Vector();What uer doing is craeting a new vector object everytime the while does an ityteration so when your while loop does 40000 loops there will be 40000 new objects in jou memory
i sugest moving the decleration outside the while loop:
list = new Vector();
while(true)
///rest of loop
} This could also be a problem
hope it help :-)
werns

How does object memory management works?

Hi all,
I'm having a lot of problems with memory which seems not to be released when using objects (on Oracle 9i 9.0.1.1.1). I've prepared the following test:
create type t_test as object (
id number,
member function FunctTest(TBL IN CHAR, expand IN CHAR) return varchar2
) not final;
create or replace type body t_test as
MEMBER FUNCTION FunctTest(TBL IN CHAR, expand IN CHAR) RETURN varchar2 IS
BEGIN
return NULL;
END FunctTest;
end;
create or replace function FunctTest2(TBL IN CHAR, expand IN CHAR) RETURN varchar2 IS
BEGIN
return NULL;
END FunctTest2;
create table tab_test of t_test;
insert into tab_test values(1);
commit;
As you can see, I create a simple type with a member function, and a schema function who does the same (nothing, in this case). Then I call the two functions with the following PL/SQL blocks:
declare i integer;
t varchar2(4000);
ob t_test;
begin
select value(a) into ob from tab_test a where a.id=1;
for i in 1..5000 loop
select ob.FunctTest('A','S') into t from dual;
end loop;
end;
declare i integer;
t varchar2(4000);
begin
for i in 1..5000 loop
select FunctTest2('A','S') into t from dual;
end loop;
end;
If you run these blocks with Task Manager opened (I use W2000) on server console, you can see how memory usage grows very fast with the first block, and how it doesn't change with the second one.
The memory isn't released till the session is alive.
I'm trying to develop an object application, but these memory leaks are making me crazy.
Geoff, does release 2 solve some of these problems?
In particular, please, do I need to free by myself temporary objects (these ones referenced in PL/SQL blocks)? In which way? I haven't found anything about object memory management in documentation...
As always,
Thanks for any support to everybody.
Andrea Arilotta
[email protected]

Andrea,
Do you have an Oracle Support customer ID? If you can log a TAR on http://metalink.oracle.com with your customer id, someone can take a closer look at this problem.
Regards,
Geoff
Hi all,
I'm having a lot of problems with memory which seems not to be released when using objects (on Oracle 9i 9.0.1.1.1). I've prepared the following test:
create type t_test as object (
id number,
member function FunctTest(TBL IN CHAR, expand IN CHAR) return varchar2
) not final;
create or replace type body t_test as
MEMBER FUNCTION FunctTest(TBL IN CHAR, expand IN CHAR) RETURN varchar2 IS
BEGIN
return NULL;
END FunctTest;
end;
create or replace function FunctTest2(TBL IN CHAR, expand IN CHAR) RETURN varchar2 IS
BEGIN
return NULL;
END FunctTest2;
create table tab_test of t_test;
insert into tab_test values(1);
commit;
As you can see, I create a simple type with a member function, and a schema function who does the same (nothing, in this case). Then I call the two functions with the following PL/SQL blocks:
declare i integer;
t varchar2(4000);
ob t_test;
begin
select value(a) into ob from tab_test a where a.id=1;
for i in 1..5000 loop
select ob.FunctTest('A','S') into t from dual;
end loop;
end;
declare i integer;
t varchar2(4000);
begin
for i in 1..5000 loop
select FunctTest2('A','S') into t from dual;
end loop;
end;
If you run these blocks with Task Manager opened (I use W2000) on server console, you can see how memory usage grows very fast with the first block, and how it doesn't change with the second one.
The memory isn't released till the session is alive.
I'm trying to develop an object application, but these memory leaks are making me crazy.
Geoff, does release 2 solve some of these problems?
In particular, please, do I need to free by myself temporary objects (these ones referenced in PL/SQL blocks)? In which way? I haven't found anything about object memory management in documentation...
As always,
Thanks for any support to everybody.
Andrea Arilotta
[email protected]

Resizing an array of struct inside a DLL using the memory manager

Hi all,
I dug deep inside the boards, but wasn't able to find a solution for my problem.
I'm building a dll, which does some imageprocessing and should return an array of structs to labview, with one struct for every element in the image.
As I don't know the number of elements beforehand and the limit of the number is numbers of magnitude larger then the expected one, I don't want to allocate such a huge chunk of memory prior to the dll call in labview.
In a former version I used a 2d array for the elements, where each row holds the values of every element. Here I used the NumericArrayResize-function, which worked quite well. But I have to add more sub-processes and using structs (or clusters in labview) appears to be more usefull and cleaner for me, in addition I had to cast some of the elements back and foreward a few times.
So one element-struct should hold 2 singles and 1 uint32. My question is now, how can I resize this array of struct with memory manager functions as the NumericArrayResize-functions does not suit this purpose?
(Accessing a given array of structs inside the DLL and after that reading the changed values in Labview is surprisingly easy )
Thanks in advance
Solved!
Go to Solution.

Well, I was able to solve it myself. I found this thread, where the first post of rolfk made me thinking. It appeared to me, that the numericarrayresize-function behaves very similar to the realloc-function of c. So I used the type unsigned int 8 (which is just one byte) and multiplied it by the number of bytes used by one struct, in my case 12 bytes (4+4+4) and then multiplied it by the number of structs (elements in the image) i have. Luckily it worked and the memory block was resized exactly as I wanted it to be. Important to note: do not forget to adjust the size element of the handle, otherwise Labview does not know about the changed size.

Difference between nio-file-manager and nio-memory-manager

Hi,
what's the difference between nio-file-manager and nio-memory-manager? The documentation doesn't really discuss the differences as far as I know. They both use nio to store memory-mapped files don't they? What are the advantages/disadvantages of both?
When to choose the first one and when the second when storing a large amount of data? Can both be used to query data with the Filter API? Are there size limits on both?
Best regards
Jan

Hi Jan,
The difference is that one uses a memory mapped file and one uses direct nio memory (as part of the memory allocated by the JVM process) to store the data. Both allow storing cache data off heap making it possible to store more data with a single cache node (JVM) without long GC pauses.
If you are using a 32 bit JVM, the JVM process will be limited to a total of ~3GB on Windows and 4GB on Linux/Solaris. This includes heap and off heap memory allocation.
Regarding the size limitations for the nio-file manager Please see the following doc for more information.
With the release of 3.5 there is now the idea of a Partitioned backing map which helps create larger (up to 8GB of capacity) for nio storage. Please refer to the following doc.
Both can be used to query data but it should be noted that the indexes will be stored in heap.
hth,
-Dave

Oracle 9i Automatic PGA Memory Management

Hello,
my team and me, we are facing difficulties to change the size of the PGA used by our server processes for HASH JOIN, SORT... operators,
here you can see the results of "select * from v$pgastat":
[pgastat dynamic view results|http://pastebin.com/m210314dc]
We have been increasing consecutively our pga_aggregate_target parameter from 1.7 Gb initially to 4Gb then at the end 6Gb, the value of "Global memory bound" and " aggregate pga auto target" on the link above are still equal to 0.
I have been reading threads on the forum and documentation see below, I understand how the global memory manager (CKPT) computest the sql memory target and then the global memory bound, as far as I understand I can only "play" on the pga_aggregate_target value in order to increase the size of our PGAs (I exclude to play with hidden parameters).
- Joze Senegacnik: Advanced Management of working areas in Oracle 9i/10g : http://tonguc.yilmaz.googlepages.com/JozeSenegacnik-PGAMemoryManagementvO.zip
- Dageville Benoit and Zait Mohamed: SQL memory management in oracle 9i
Here different information that could be usefull:
OS: solaris 10 (db running in a non global zone)
Arch: 64-bit sparcv9 kernel modules
Physical memory: 32 Gb (being shared between all non global zones)
Oracle version: 9.2.0.5 32bits
Values of init parameters and hidden parameters that could be relevant:
[init parameters|http://pastebin.com/m40340cf4]
[hidden parameters|http://pastebin.com/m50d74c53]
Maybe useful queries:
over work areas views, I use the following script:
[wa_analysis.sql|http://pastebin.com/d606ebd9b]
and the result of it:
[result of script wa_analysis.sql|http://pastebin.com/m5f49a2e5]

Joze Senegacnik wrote:
- either your sessions are using a lot of memory for storing variables like pl/sql arrays which is subtracted from automatic management: PGA_AGGREGATE_TARGET - (aggregated persistent area + a part of the run time area of all server processes)
- you are hitting a bug
- or maybe something elseI am really happy you come to this conclusion too, they are the same we made with my team and we have submitting to Oracle support via metalink SR 3-1216060641, we were asking if we hit the following bug (in note 1) or we leak about pl/sql or java... or else indeed,
note 1: PGA_AGGREGATE_TARGET Assigned Memory Is Left Unconsumed When Set High [ID 844542.1]
Joze Senegacnik wrote:
I would like to know:
1.) what were the values for global memory bound and autotarget immediately (or in short time) after the database restart or when you have increased them Just after the restart of the database and just after the change of P_A_T, we query v$pgastat immediately after and the value of global memory bound and auto target were equal to 0 byte,
2.) If you are able to change value of PGA_AGGREGATE_TARGET (P_A_T) to 10GB what happens with global memory bound and auto traget. They should be positive at least for a short time. As this is a dynamic parameter you can change it for a short time, run queries and set it back.We plan to do this tonight, we have an "heavy" ITIL change management procedures that allow us to make changes approved by change manager and only during night maintenance window on production system, I come back to you tomorrow. But we have been increasing from 1,7Gb to 4Gb to 6Gb, each time I have been querying v$sgastat in the next 2 mins and global memory bound and auto target were equal to 0 byte.
3.) Have you checked on the OS level how much memory are using server processes - do these numbers come along with what Oracle says. Not during problematic activities, meaning active work areas performing HASH-JOIN, SORT... operators,
unfortunately it is a production system, even if he performs poorly, we are not allowed to try or retry the poor queries, but if it comes again I'll do it,
during low activities, here the results paste with the scripts I used:
[pga processes info in oracle|http://pastebin.com/f2e540062]
I spooled the result rows of this previous script in /var/tmp/pga_processes.log then I loop over all processes pid and display pmap output anon info like this:
h5. cat /var/tmp/pga_processes.log | awk -F' ' '{print $5}' | xargs -n 1 -i pmap -x {}| grep -v 'Addres' |egrep 'Kb' 2>&1 > /var/tmp/pga_processes_os.log
then I merge line by line the two files with unix paste command, here the results:
[os and oracle pga informations|http://pastebin.com/f4135c8a6]
4.) How many server processes are running on you system in average/max and are you using just dedicated processes or also shared?in average 250, we are only using dedicated processes,
5.) At time of low activity is the global memory bound still 0 or becomes > 0. I have been querying every 15 min during more than 24 hours low activities, it still stay to 0,
5.) Are you experiencing paging/swapping on OS level?No, here orca figures for details:
[free memory|http://img509.imageshack.us/img509/5897/ohuron1asd2gauge1024xfr.png]
swap
[pagein pageout|http://img121.imageshack.us/img121/6946/ohuron1asd2gaugepginper.png]
[memory usage|http://img19.imageshack.us/img19/2213/ohuron1asd2gaugeppkerne.png]
6.) Please post the result of: select * from X$QESMMSGA ;during low activities, [results X$QESMMSGA|http://pastebin.com/f61df7093]
While you will be answering to my questions I'll try to figure out what we can do to properly diagnose the problem. As you are on 9i it is a little bit harder.I am really kind of your help, as we say in my country, "if you need tow arms one day to carry something, call me."
--Jeremy Baumont

Oracle 11g AMM (Automatic Memory Management)

Hi All,
I have a very powerful server 24 Processors with 6 cores each and 74 GB RAM for my production database. The server will host only one production database. I wanted to use AMM for this database and allocate maximum memory to Oracle by setting memory_target. By default /dev/shm is set 37 GB but I wanted to increase it least 55 GB. I know I can get this changed by my system admin but I wanted to know how much memory should leave for OS?
Please help me on sizing this.
Thanks,
Arun Singh

From MOS ID 169706.1
Automatic Memory Management
Starting with Oracle Database 11g, the Automatic Memory Management feature requires more shared memory (/dev/shm) and file descriptors. The shared memory should be sized to be at least the greater of MEMORY_MAX_TARGET and MEMORY_TARGET for each Oracle instance on the computer. To determine the amount of shared memory available, enter the following command: # df -k /dev/shm/
Note: MEMORY_MAX_TARGET and MEMORY_TARGET cannot be used when LOCK_SGA is enabled or with huge pages on Linux

Bridge Memory Management

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