Fs.file-max ,limits.conf

Dear All,
We are running oracle apps 12.0.4.We are implemeting a module called DBI.In the process of implementing the apps system is required to open files more than 1027679.If i give value more than 1027679 the session is not opend for user.It means value more than 1027679 is not been accepted by the linux machine.How can we increase open file discriptor to 2000000.
o/s:RHEL4.4
Regards

32-bit can only address up to 4 GB of memory. The maximum RAM for a 32-bit kernel and all processes is limited to 3.25 GB, depending on BIOS. With a PAE kernel, 36-bit, and appropriate CPU support you can address up to 16 GB of RAM. However it will slow down memory access and each process is still limited to 3GB, and the kernel is limited to 1GB. If you have more than 4 GB of RAM installed, than a 64-bit kernel will be able to address RAM directly, which will be faster and also solve your memory constrains. You can run 32-bit software on a 64-bit system, provided you have installed the 32-bit libraries, without any performance penalty since the x86 instruction set is still in hardware, hence x86_64. There is no reason to use a 32-bit system unless the CPU does not support long mode like Intel or AMD CPU's before 2003.

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Open file limit in limits.conf not being enforced

So I am running a Arch installation without a graphical UI and Im running elasticsearch on it as its own user (elasticsearch). Since elasticsearch needs to be able to handle more than the 4066 files that seems to the be the default, I edit /etc/security/limits.conf
#* soft core 0
#* hard rss 10000
#@student hard nproc 20
#@faculty soft nproc 20
#@faculty hard nproc 50
#ftp hard nproc 0
#@student - maxlogins 4
elasticsearch soft nofile 65000
elasticsearch hard nofile 65000
* - rtprio 0
* - nice 0
@audio - rtprio 65
@audio - nice -10
@audio - memlock 40000
I restart the system, but the limit is seemingly still 4066. What gives? I read on the wiki that in order to enforce the values you need a pam enabled login. I dont have a graphical login manager and
grep pam_limits.so /etc/pam.d/*
Gives me this..
/etc/pam.d/crond:session required pam_limits.so
/etc/pam.d/polkit-1:session required pam_limits.so
/etc/pam.d/su:session required pam_limits.so
/etc/pam.d/system-auth:session required pam_limits.so
/etc/pam.d/system-services:session required pam_limits.so
Any ideas on what I have to do to raise the open file limit here?
Thanks

Seems like adding the LimitNOFILE parameter to the systemd service file did the trick, but still doesnt explain why limits.conf isnt being enforced.
Last edited by Zygote (2014-07-17 10:04:43)

Nio ByteBuffer and memory-mapped file size limitation

I have a question/issue regarding ByteBuffer and memory-mapped file size limitations. I recently started using NIO FileChannels and ByteBuffers to store and process buffers of binary data. Until now, the maximum individual ByteBuffer/memory-mapped file size I have needed to process was around 80MB.
However, I need to now begin processing larger buffers of binary data from a new source. Initial testing with buffer sizes above 100MB result in IOExceptions (java.lang.OutOfMemoryError: Map failed).
I am using 32bit Windows XP; 2GB of memory (typically 1.3 to 1.5GB free); Java version 1.6.0_03; with -Xmx set to 1280m. Decreasing the Java heap max size down 768m does result in the ability to memory map larger buffers to files, but never bigger than roughly 500MB. However, the application that uses this code contains other components that require the -xMx option to be set to 1280.
The following simple code segment executed by itself will produce the IOException for me when executed using -Xmx1280m. If I use -Xmx768m, I can increase the buffer size up to around 300MB, but never to a size that I would think I could map.
try
String mapFile = "C:/temp/" + UUID.randomUUID().toString() + ".tmp";
FileChannel rwChan = new RandomAccessFile( mapFile, "rw").getChannel();
ByteBuffer byteBuffer = rwChan.map( FileChannel.MapMode.READ_WRITE,
0, 100000000 );
rwChan.close();
catch( Exception e )
e.printStackTrace();
I am hoping that someone can shed some light on the factors that affect the amount of data that may be memory mapped to/in a file at one time. I have investigated this for some time now and based on my understanding of how memory mapped files are supposed to work, I would think that I could map ByteBuffers to files larger than 500MB. I believe that address space plays a role, but I admittedly am no OS address space expert.
Thanks in advance for any input.
Regards- KJ

See the workaround in http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4724038

File max size on Win32 OS

Hello,
What is your recommendation for file max size on Win32 OS like Win2K and above ? 2G,4G ? And what about Win64 systems ?

Data files are not exactly unlimited in size, so the term "Unlimited" refers to the ceiling your datafile is able to reach, and it depends on the Oracle Block Size. To find the absolute maximum file size multiply block size by 4194303. This is the actual maximum size. You may want to read the Metalink Note:112011.1.
A datafile cannot be oversized, otherwise it could get corrupted. Let's say if your database is 8k blocks that means that one file can not exceed approximately 34GB (34,359,730,176 bytes) without having database corruption.
Sizing datafiles is a matter of manageability, it depends on your storage, the amount of space allocated in a single managed storage unit.
On 10g Oracle has created the bigfile tablespace concept, which is a way to simplify management of tablespaces and allows you to create bigfile tablespaces.
Those Bigfile tablespaces cannot contain but only one file, up to 4G blocks size.
With the smallFile tablespace the maximum number of datafiles in the Database is limited to 64K files, 'pretty big to be small'.
For the bigfile tablespace you may refer to these threads
Re: MAX size for tablespace = UNLIMITED ???
Re: Max size of datafiles
~ Madrid

ICloud File Size Limitation

I recently updated my iCloud storage to 1 TB in anticipation of making better use of it once the new Yosemite OS was released.
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The free space on the drive is the same as the free space on my local computer hard drive. It is working like Dropbox but there is no way to do a selective sync.
I wanted to back up my iPhoto library from external drive to the Cloud and it said I didn't have enough room. My file is 166 Gig so in order to back it up I would need equivalent free space on my local drive. Not Good.
Then when I disabled icloud Drive on my Mac and tried to upload to the drive through the web I ran into the 15 gig max file size limit.
So, after spending all this money for extra 1 TB storage it looks like I can't even use it to back up my iPhoto library or my iTunes library.
Not impressed :-(.
I hope that Apple has plans to remove the file size limitation very soon.
If I have a 1TB cloud account I would like to use it like any other external hard drive without limitations on file size and I am hoping that Apple won't throttle the maximum number of files uploaded per day or per hour as other cloud services do.
When I updated my storage to 1 TB a few months ago there was no indication that these limitations existed. If they did I wouldn't have upgraded.

So my frustration is that I am paying $20 a month for the larger storage and can't use it to back up my files.
That storage is entirely separate than the iCloud Drive. The following is from this Apple document: iCloud: iCloud storage and backup overview
Here’s what iCloud backs up:
Purchase history for music, movies, TV shows, apps, and booksYour iCloud backup includes information about the content you have purchased, but not the purchased content itself. When you restore from an iCloud backup, your purchased content is automatically downloaded from the iTunes Store, App Store, or iBooks Store. Some types of content aren’t downloaded automatically in all countries, and previous purchases may be unavailable if they have been refunded or are no longer available in the store. For more information, see the Apple Support article iTunes in the Cloud availability by country. Some types of content aren’t available in all countries. For more information, see the Apple Support article Which types of items can I buy in my country?.
Photos and videos in your Camera Roll
Device settings
App data
Home screen and app organization
iMessage, text (SMS), and MMS messages
Ringtones
Visual Voicemail
This was in place long before the iCloud Drive was introduced.

Limits.conf

Hi all,
OS - Linux
DB - 11.1.0.7.0 - 64bit Production
What is limits.conf file, use of it ? what is the significance if using from root and oracle user ?
Please focus on the below parameters : -
@dba hard nofile 65536
@dba soft nproc 16384
@dba hard nproc 16384
@dba soft stack 32768
@dba hard stack unlimited
search in net also, but didn't find the exact answer.
Thanks.

Did you try:
$ man limits.confIt has pretty good documentation. After that, check out the documentation for part of the resource limits (RLIMITS) in /usr/share/doc/pam-0.99.6.2/Linux-PAM_SAG.txt and then check back here.
Basically, limits.conf is to help control system hogs from dominating the machine. For the various items, you have a soft limit which can be exceeded only for limited times, and a hard limit which cannot be exceeded at all. The action taken when a limit is encountered depends on the limit but is usually in the form of a system call error report.
Some limits are per-process, some are per user. The per user limits apply collectively to all that user's logins.
HTH

/etc/security/limits.conf

Hello
OS : Redhat enterprise Linux Ver 5
When installed as per install guide, I see that /etc/security/limits.conf updated with entry as :
oracle hard nofile 65536
1) Why is the default limit of 1024 not sufficient ?
2) Does oracle opens more than 1024 files at a time ?
3) How to find the exact list of files open by the oracle user at any given point in time ?
Thanks in advance for your help.

Hi,
that's a good question. I don't neither have an answer but I assume that especially in the past (8i) when datafile size was limited that it was causing problems on huge databases. Making it enough high could also reduce their support effort. This is just may stomach feeling which I am telling you but the truth will tell you someone else. Maybe someone else here in the forum knows more than me.
I am not 100% sure but:
$ lsof|grep oracle|wc -l
1762 shows me over 1024 open files. This with a running ASM instance, a DB and a listener.
Cheers,
David
OCP 9i
http://www.oratoolkit.ch/otn.php

File path limitation across lan shared storage

Friends,
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I have adobe InDesign and have projects (files) on a NAS I am experiencing difficulties with the files on the nas.
[ crashing the app , running slow ] I am wondering if having files nested 10 -14 levels deep could be a problem.
My file path length are about 80 - 200 char.
the nas is a buffalo terrastation [ xfs ] attached 1000 mbps
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Service that run Application Server specifies in Log
On Tab, Log on as Local System account.
And when I run the servlet through its url, user.name
JAVA property is SYSTEM.
When I log on to the server with Admin user and invoke
the servlet's doGet method from other java class
locally, writing is succeeded. user.name JAVA property
in this case (when I logged on) is Admin.
Probably I should be logged on to the system before I
can perform operations with files on the local
network?So Admin has permission to write to that share but 'Local System' doesn't.
Option 1 (recommended): Check out jCifs, if you use that you can specify a different user to write to the share from that which the system is running under.
Option 2: run the service as a user who does have appropriate permissions.
Option 3: run the application server in the foreground instead of as a service.

Is there a file size limitation to using this service?

I am working on a large PDF file (26 mb) and I need to re-size the original and mess with the margins. I don't beleive there is an easy way to do this in Adobe Acrobat 6.0 Pro. It sounds like I have to convert the file back to a Word document, do the adjustments there and then produce a new PDF. I have two questions:
Is there a file size limitation to using this service?
Will a PDF to Word doc. conversion mantain the format of the orginal PDF?
Thanks
Tim

Good day Tim,
There is a 100MB file size limitation for submitting files to the ExportPDF service. As for the quality of the conversion, from our FAQ entitled Will Adobe ExportPDF convert both text and formatting information?:
Adobe ExportPDF is capable of exporting high quality information, but the quality of your Word or Excel document depends on the quality of the PDF file you start with. For instance, if your PDF file was originally authored in Microsoft Word or Excel and converted to PDF using the PDFMaker functionality of Adobe Acrobat®, your PDF file contains a rich set of information that can be captured by Adobe ExportPDF. This includes relative positioning of tables, images, and even multi-column text, as well as page, paragraph, and font attributes.
If your PDF file was originally authored using simpler PDF generation methods, such as “print to PDF” or “scan to PDF” options, Adobe ExportPDF will convert any recognizable text and then use sophisticated conversion intelligence to preserve as much of the page layout as possible.
Please let us know if you have any other questions!
Kind regards,
David

File Download limited to 4 files at a time... the rest are pending...

safari version 2.0.3 (417.9.2)
File Download limited to 4 files at a time... the rest are pending...
- it did not used to be this way -
- is there a way to up the limit to more than 4 things at a time - if so how?

I believe 4 is the Safari limit. To be sure, go to your User Library>Safari folder and trash the downloads.plist file. Restart Safari and try multiple downloads. Trashing this file resets the Safari Download function and clears any corruption in the file.
If 4 is the limit, you'll have to try a 3rd party application such as SpeedDownload, which offers much more download flexibility and features than Safari.
One word of caution, if you try SpeedDownload but decide it is not for you, make sure you uninstall all of its components, especially any in your Internet-Plug-ins or InputManagers folder in either the Main or User Library, and the YazSoft preference file in your Preferences Folder. I know the app. comes with an uninstall feature, however, always good to double check.

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.
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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.

Premiere Pro CC 2014 file size limits?

Hi a friend needs to create a 37hr uncompressed AVI file (by combining an avi of pictures and mp3 of audio of a performance) and is wondering if it can be done using Adobe Premiere Pro CC 2014, ie are there any file size limits? Any comments much appreciated.

Would be interesting to know how you are going to store that. 37 hours of HD uncompressed in an AVI wrapper requires around 24 TB of free disk space on a single volume. That means you would need something like 12 x 3 TB drives in Raid6 + 1 HS, requiring at least a 16 port raid controller for those 13 disks, just for the output file. Due to fill rate degradation, that is cutting it thin. Additionally at least a X79 or X99 motherboard with 2011 socket is necessary.
Next question is, who would be crazy enough to marathon-watch 37 hours of a performance?
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Increase file descriptor limits on managed server

Hi,
we have an Admin Server which manages a managed server.
We need to increase file descriptor limits of managed server.
We modified the script commEnv.sh on Admin server and we successfully increased to 65,536 the limit. Here is the log of the boot of Admin Server
####<Sep 25, 2013 11:04:18 AM CEST> <Info> <Socket> <lv01469> <AdminServer> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1380099858592> <BEA-000416> <Using effective file descriptor limit of: 65,536 open sockets/files.>
How can we do the same thing on managed server. We tried to modify the same script (commEnv.sh) on managed server but the file descriptor limits is still 1,024.
####<Sep 25, 2013 11:23:30 AM CEST> <Info> <Socket> <lv01470> <119LIVE_01> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1380101010988> <BEA-000415> <System has file descriptor limits of - soft: 1,024, hard: 1,024>
####<Sep 25, 2013 11:23:30 AM CEST> <Info> <Socket> <lv01470> <119LIVE_01> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1380101010989> <BEA-000416> <Using effective file descriptor limit of: 1,024 open sockets/files.>
Thanks in advance

Solved.
It was necessary restart Node Manager after modify the commEnv.sh.

Bug: Unhandled Exception: System.IO.IOException: The requested operation could not be completed due to a file system limitation

Hello, I have a 35GB text file that I'm copying from one folder to another folder via c#
(I simply open a StreamReader and a StreamWriter and copy line by line (something like sw.WriteLine(sr.ReadLine());)
If [the destination folder is a "windows compress folder" (right click folder > properties > Advanced > Compress content to save disk space)] then it fails else it works well.
Any idea how to solve the issue?
I have windows 8.1 with all latest updates. The ssd is a samsung 850 pro, and I tried on 2 machines, same results.
So to recap, it seems the issue is with the writing of big files on a compress folder, the reading is fine.
thanks.
w
Error:
2015.01.08 10:15:27] Unhandled Exception: System.IO.IOException: The requested operation could not be completed due to a file system limitation
[Err, 2015.01.08 10:15:27]
[Err, 2015.01.08 10:15:27] at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
[Err, 2015.01.08 10:15:27] at System.IO.FileStream.WriteCore(Byte[] buffer, Int32 offset, Int32 count)
[Err, 2015.01.08 10:15:27] at System.IO.FileStream.Write(Byte[] array, Int32 offset, Int32 count)
[Err, 2015.01.08 10:15:27] at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
[Err, 2015.01.08 10:15:27] at System.IO.StreamWriter.Write(String value)
w.

Hi w,
Per my understanding. This is not a C# code issue. I doubt the issue related your OS.
After search the error info,
here is a possible solution, please take a look
“The requested operation
could not be completed due to a file system limitation.”
<copied>
Please use Disk Defragmenter to defrag the NTFS volume on your side, which should fix this issue.
Please refer to:
A heavily fragmented file in an NTFS volume may not grow beyond a certain size
http://support.microsoft.com/kb/967351
For the limitation of NTFS, please check the following online guide.
How NTFS Works
http://technet.microsoft.com/en-us/library/cc781134(WS.10).aspx
</copied>
Best of luck!
Kristin
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ERROR-- 9 [Motor unable to stabilize between min and max limits] -- (2708) TEST FAILED

Re: ERROR -- 9 [Motor unable to stabilize between min and max limits] -- (2708) TEST FAILED
Please Somebody Tell me What Is The Issue.

It might be helpful if indicated exactly what you were doing when the error appeared.

Fs.file-max ,limits.conf

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