size of the output buffer

Similar Questions

• How do to the size of the log buffer reduce with huge Pages Linux

  Data sheet:

  Database: Oracle Standard Edition 11.2.0.4

  OS: Oracle Linux 6.5

  Processor: AMD Opteron

  Sockets: 2

  Carrots / power outlet: 16

  MEM: 252 GB

  Current SGA: GB 122 automatic shared memory (EAMA) management

  Special configuration: Linux huge Pages for 190 GB of memory with the page size of 2 MB.

  Special configuration II: The use of the LUKS encryption to all drives.

  Question:

  1. How can I reduce the size of the log buffer? Currently, it appears that 208 MB. I tried to use log_buffer, and it does not change a thing. I checked the granule size is 256 MB with the current size of the SGA.

  Reason to reduce:

  With the largest size of log buffer the file parallel write newspaper and the synchronization log file is averaged over 45 ms most of the time because she has dumped a lot of stuff at the same time.

  Post edited by: CsharpBsharp

  You have 32 processors and 252 GB of memory, so 168 private discussions, so 45 MB as the public threads size is not excessive.  My example came from a machine running Oracle 32-bit (as indicated by the size of 64 KB of threads private relative to the size of 128 KB of your son) private with (I think) 4 GB of RAM and 2 CPUs - so a much smaller scale.

  Your instance was almost inactive in the meantime so I'd probably look outside the Oracle - but verification of the OS Stats may be informative (is something outside the Oracle using a lot of CPU) and I would like to ask you a few questions about encrypted filesystems (LUKS).  It is always possible that there is an accounting error - I remember a version of Oracle who report sometimes in milliseconds while claiming to centisecondes - so I'll try to find a way to validate the log file parallel write time.

  Check the forum for any stats activity all over again (there are many in your version)

  Check the histogram to wait for additional log file writes event (and journal of file synchronization - the lack of EPA top 5 looks odd given the appearance of the LFPW and and the number of transactions and redo generated.)

  Check the log file to track writer for reports of slow writes

  Try to create a controlled test that might show whether or not write reported time is to trust (if you can safely repeat the same operation with extended follow-up enabled for the author of newspaper which would be a very good test of 30 minutes).

  My first impression (which would of course be carefully check) is that the numbers should not be approved.

  Concerning

  Jonathan Lewis

• How to clear the output buffer, possibly resize and burn again, before you begin the task of output

  I use PyDAQmx with a USB-6363, but I think the question is generic to DAQmx.

  I have an output buffer that I want to be able to (re) write to without starting the task output.

  More specifically, I have a graphical interface and a few sliders, the user can move.  Whenever the slider changes, a new set of values is loaded into the buffer output through DAQmxWriteAnalogF64.  After you set the value, the user can click on a button and start the task output.

  In some cases the change in cursor does not require a change in buffer size, only a change in the data.  In this case, I get the compalint following DAQmx as they tried writing:

  The generation is not yet started, and not enough space is available in the buffer.

  Set a larger buffer, or start the generation before writing data more than content in the buffer.
  Property: DAQmx_Write_RelativeTo
  Value: DAQmx_Val_CurrWritePos
  Property: DAQmx_Write_Offset
  Corresponding value: 0
  Property: DAQmx_Buf_Output_BufSize
  Corresponding value: 92

  In other cases the change in cursor requires both change in the size of the buffer and data modification.  In this case, I get the following, but only after that do a few times each time increase the size of the writing.

  DAQmx writing failed because a previous writing DAQmx configured automatically the size of output buffer. The size of the buffer is equal the number of samples written by channel, so no additional data can be written before the original task.

  Start the generation of before the second writing DAQmx or set true in all instances of writing DAQmx Auto Start. To gradually write to the buffer before starting the task, call DAQmx Configure an output buffer before the first writing DAQmx.
  Task name: _unnamedTask<0>

  State code:-200547
  function DAQmxWriteAnalogF64

  I tried to configure the output via DAQmxCfgOutputBuffer buffer (in some cases, by setting it to zero or a samples, then save again, in an attempt to clear it) but that doesn't seem to do the trick.

  Of course, I can work around the problem by loading data only when the user clicks the end button, but not what I'm asking here.

  Is it possible to "remake" the writing of output before you begin the task?

  Thank you

  Michael

  Today I have no material practical to validate, but try unreserving task before writing the new buffer:

  DAQmxTaskControl (taskHandle, DAQmx_Val_Task_Unreserve);

  With a simulated device, he made the error go away in case the buffer is the same size.  You will need to validate if the data are in fact correct, but I think it should be (unreserving I would say reset the write pointer so the old buffer are replaced with the new data).

  I always get errors when you try to change the size of buffer if (on my 6351 simulated).  I posted some similar mistakes about the reconfiguration of the tasks here, I guess it is possible that this issue has also been set at 9.8 (I always use 9.7.5 on this computer).  If the behavior is still present in the new driver, and also appears on real hardware (not just simulated), then it seems that this is a bug of DAQmx someone at OR should be considered.

  I wrote a simple LabVIEW VI that captures the error in order to help people to NOT reproduce it:

  

  The best solution at the moment would be likely to re-create the task if you need to change the size of the buffer (or avoid writing data until you are sure what will be the size of buffer).

  Best regards

• in the output buffer 9402

  I have a task to output a very long sequence with very precise timings, that is to say, I have to use the buffering. But the sequence can be of length for a few days, and we know exactly how much (until the user stops), so that the preform the entire buffer is unrealistic.
  Also, I have no device and work on the Simulator.
  NEITHER 9402, cDAQ-9188
  My VI:

  

  generate the table is simple, now, it doesn't matter.
  In the simulation, I see dt = 500 ms, so I conclude that the write function DAQmx is waiting until the free space appears in the buffer.
  Customer launch VI to the device real and dt<70 ms,="" ie="" waiting="" is="" not="">
  When a mistake, how to integrate the wait?
  "standby mode" is not like the decision, as all cases are pending, with just another use of the CPU.

  I send the my code snippet in the first message.
  Now, I have changed it like that, it works. Output buffer must be reserved by 'output buffer conf' vi.

  

  Inside of a loop that is really not necessary.

  As for your idea of book dummy table, it is very strange. The experience may be longer than the week. And for a week, I need 800,000 points (1 kHz) 604. Impossible book this buffer.

• Can make the size of the log buffer be changed or is managed internally by oracle

  Can again change the log buffer size? or is managed internally by oracle in the SGA? We are on oracle 10.2.0.3.
  
  The reason why I asked the question was that our construction team do estimates for data/memory sizing properly... so we wanted to know if it can be changed or not?

  Hi S2k!

  The SGA Memorystructure is handled automatically by Oracle, if the SGA_TARGET initializationparameter is set. But nothing less you are able to configure the size of a memorystructure by yourself. Here is a good article on the optimization of the log buffer.

  [http://www.dba-oracle.com/t_log_buffer_optimal_size.htm]

  I hope this will help you along.

  Yours sincerely

  Florian W.

• How to replace the output buffer?

  I'm a generation of finite signals 2 lanes on a0 and a1. I want to change one or the other of the waveforms at various times during the program and sometimes I have to be able to overwrite the contents of the buffer with a new set of data until the generation has run. Should be easy, but so far I have not figured out how do.

  When I try, the first attempt to crush the buffer I get error-200547 occurred .vi DAQmx Write (analog 2D NChan DBL NSamp) that says full buffer, cannot write more data until the task has been executed.

  How to clear the contents of the buffer or make it possible to replace the buffer?

  I found the solution, systematically through the palette DAQmx looking probable functions.

  Simply insert a DAQmx controls Task.vi before the write.vi DAQmx, with set to cancel the Action. You can write new data to the buffer.

  I knew there must be possible!

• What are the data size of the buffer on PX1394E - 3 50

  Hello

  I bought this drive a few days ago and I'm a little confused on the
  the size of the data buffer. The box indicates 16 MB, Toshiba web page says 8 MB, etc...

  Nobody knows, what are the data buffer size of this model?
  Is there a SW or the request to meet with whom?

  BTW, great car, fast, noise, however, extremely when it comes to finding large files.

  Thank you
  Francisco

  Hello

  I have lurked around a bit and it seems that your drive has buffer of 16 MB that is absolutely definitely sure. To check the details of your computer, you can use the tool "Sisoft Sandra". You can download [url href = http://www.sisoftware.net/index.html?dir=&location=downandbuy&langx=en&a=] here [/ URL].

  After download, just install it and you will get all information about your computer, as the size of the buffer of your external hard drive.

  Welcome them

• How to increase the size of the buffer veristand UDP?

  Hello!

  I'll have some lost data of veristand screen and I want to increase the size of the UDP buffer. This is a new option in veristand 2011 that I can read on this link: http://zone.ni.com/reference/en-XX/help/372846C-01/veristand/whats_new/ (improving the workspace section).

  Someone at - it now haow to do?

  Thanks in advance,

  Miguel.

  Do you mean how to do it from the VeriStand workspace? On your graphical work space click on setup to enter the chart configuration dialog box. In the configuration dialog box, you will see where you can enter a new value for the UDP buffer size.

• Using the output with 6009 or 6216 possible buffer?

  Hello

  I have a USB6009 and a USB6216. I need to generate a signal by using the analog output and I would use the output buffer. My questions are:

  -The USB6009 has an output buffer? I always get an error, but I know from experience that this device is very limited, so I wonder if they have not only an output buffer... (Programs in input buffer are not a problem at all).

  -J' took the USB6216 and I tried the example WfmGenUp.c downloaded from somewhere in the area of the developer (sorry I lost the link but fix the code) but I am not all analog output signals and after you press ENTER to stop the program (depending on the show) I get this error message:

  NO MORTALS RUN - TIME ERROR: 'WfmGenUp.c', line 113, col 9, id thread 0x0000088C: DAQmxStopTask function: (is-200016 return value [0xfffcf2b0]). Measurements: On-board memory precision passing. Due to the limitations of system and/or the bandwidth of the bus, the driver could not write data to the device fast enough to track the rate of output of the device.  Reduce your sampling rate, change the method of transfer of data (from interruptions on DMA), use a product with more on-board memory or reduce the number of programs that your computer runs simultaneously. Task name: _unnamedTask<0> Code of State:-200016

  I don't know if the problem is just that the 6216 does not support the output buffering or the other...

  -So, if the output control is not supported by 6009 or 6216 what would be the best way to constantly generate signals to 100 s/s?

  Thank you very much

  Kristel

  Hi Ryan,

  the USB-6009 case has 150 s/s softwaretimed AO, so you won´t be able to use AO stamped with the module.

  The USB-6216 supported in the analog output buffer, just follow the recommendations that the driver gives you,

  for example by reducing the sampling frequency, if there is an overflow memory due to the limitations of system and/or the bandwidth of the bus.

  Experiment with the parameters and the basic to see in what range of sampling it works.

  You can find appropriate examples

  ANSI C:

  C:\Dokumente und All Anwendungsdaten Users\Dokumente\National Instruments\NI - DAQ\Beispiele\DAQmx C\Analog Out\Generate Voltage\Cont Gen Volt Wfm - Int Clk ANSI

  LabWindows CVI:

  C:\Dokumente und Users\Dokumente\National Instruments\CVI\samples\DAQmx\Analog Out\Generate Voltage\Cont Gen Volt Wfm - Int Clk Anwendungsdaten All

• How to set the size of the buffer of interruption UDP XP 64-bit

  I need to increase the size of the incoming buffer Windows UDP interruption and also fine-tune Windows for optimal UDP performance.

  (It is the buffer used by the Windows service interrupt routine to handle incoming UDP, not setsocket for the application buffer).

  We have a real-time system, Windows is the only computer connected to the chassis generating UDP datagrams to about 800 Mbps.

  Hi _Doug Bell.
   

  Your question of Windows is more complex than what is generally answered in the Microsoft Answers forums. It is better suited for the IT Pro TechNet public.

  Please post your question in the Forums Pro Windows XP IT

• NOR-DNET Eurotherm Mini8 output buffer

  Hello

  I'm working on an application in LabVIEW with a card OR-DNET and EuroTherm Mini8 controller, who interviewed 80 bytes and output of 48 bytes input.

  I have everything started with EasyIOConfig (feeding it the right size of I/O), indexed management device, passed between them in a While loop.  Inside the While loop, I have reading DeviceNet i/oand Write DeviceNet of e/sand their diet with Convert of DeviceNet readand convert to DeviceNet write, respectively, with desired for the specified byte offsets.

  Reading works perfectly.  I ache to write to an output.  I wired a pointer to the data line goes to Write DeviceNet of e/s, (which should give me a read buffer of output, right?).  I have the first 8 bytes of address.  Outputs in the 8 first bytes work, 8 bytes and are gray and do not meet the entry.  Entry for Byte 42, writes data on 4 bytes for a reason any.

  I played with him for a while, tweaking of different things.  At one point, I was able to address the first 14 bytes, but the shift did not do anything - he just put data I16 entry sequentially in the output buffer.  Tried to use different types of data to set the offset, reload the drivers or DNET, no dice.

  I build the EXE from a PC running LabVIEW 8.6 (no card DNET) and it works on another PC with card DNET and the installed hardware, if that makes a difference.

  Any ideas?

  Solved by sending an empty array of 48 bytes to the first convert to DeviceNet write.

• resize the output

  I want to change the size of output buffer. So I need to put my code in Frame_Setup according to the sample project 'Resizer'.

  What embarrassed me is that only after calculation I can the expected size. But I can't get the image of entry in Frame_Setup.

  I don't know how I can solve this problem. I will be grateful if you can give me advice.

  BTW, it is not necessary to calculate the size of each time before rendering. What I need exactly becomes input image the first time

  I get Frame_Setup function. So I can make sure what is the size of the output video.

  Sorry, I gave an ambiguous answer.

  You cannot change size during a rendering call, however when you call for a

  new made, you'll get a call of Frame_setup firstly, during which you can change

  the same size if the frame has been previously made.

• RH7 - size of the font of contents, Index, search

  Hello group,

  I work in RH7 version HTML version 7.00.145.  WebHelp, we use for our published entries.  Is it possible to increase the size of the font in the table of contents, index and search (not the buttons - the actual text)?  Any help would be appreciated.  Thank you

  TW

  Hello

  The easy way is to open the skin editor and go to the tab Navigation. At the bottom of the tab, you can set the font family, size, and color of the navigation pane, including the index, search, and glossary.

  If you want a little more control, say the different font sizes to the table of contents, Index, or search pane, you can change the font size in the output files.

  Take a bow

  Willam

• size and the pixelation effect parameters

  Can someone just clarify this for me because we are a little confused. If I shoot a logo simple say 100mm wide with a shadow somewhere on it and I put the raster effect settings at 300. I need to provide this logo for a 3rd party and I don't know how big or small they will print it out, is the size of the output material? I mean if they print a meter wide fact the 300 dpi setting continue to apply and therefore to maintain the appearance of the shade despite the logo drawn initially to only 100mm wide?

  paulskidmore wrote:

  I mean if they print a meter wide fact the 300 dpi setting continue to apply and therefore to maintain the appearance of the shade despite the logo drawn initially to only 100mm wide?

  Yes.

  The effects are "live"which means that they are updated so that the changes in art. The 300ppi held true no matter what the size of the file is printed to if the art is distributed as his envoy to the printer.

  However, if art is put on the scale up or down inside the Illustrator drop shadow size (fall-off/blur) can change because it does not fit with precision to the art. So if someone opens your file of 100mm and it evolves up to 1 meter then shadow might look small and almost not existing or it might seem much larger than expected. It all depends on what the preferences > General > Strokes & effects of scale is currently set to.

  

• How to structure the DMA buffer for SMU 6341 DAQ card for analog output with different frequencies on each channel

  I use the outgoing/incoming analog DDK with the DAQ 6341 SMU map.

  The examples, for example aoex5, show a single timer (method outTimerHelper::loadUI), but the example shows the DMA loaded with same size of vector data.

  There is a comment in the outTimerHelper:call rogramUpdateCount, which implies that memory sizes different pad per channel can be used.

  (the comment is: switching between the sizes of the various buffers is not used)

  Nobody knows what should be the format the DMA buffer for data from multiple channels with different frequencies?

  For example, we want a0 with a sinusoid at 1 kHz and a1 with a sine wave of 1.5 Khz.  What looks like the DMA buffer?

  With the same frequency for each channel, the data are interleaved, for example (ao0 #0, ao1 #0; ao0 ao1 #1, #1,...), but when the frequencies for each channel is different, what the stamp looks like?

  Hello Kenstern,

  Data are always intertwined since each card has only a single timing for each subsystem engine.

  To AO, you must specify the number of samples that will be released to the AO. You also specify the number of channels. Because he didn't is that a single engine timing for AO, each AO will be channel will be updated at the same time to update clock tick. Data will be interlaced exactly as shown in the example because each channel AO needs output at each tick of the clock to update. The data itself can change depending on the frequency you want to copy.

  kenstern wrote:

  For example, we want a0 with a sinusoid at 1 kHz and a1 with a sine wave of 1.5 Khz.  What looks like the DMA buffer?

  With the same frequency for each channel, the data are interleaved, for example (ao0 #0, ao1 #0; ao0 ao1 #1, #1,...), but when the frequencies for each channel is different, what the stamp looks like?

  In your example, you must come with an update rate that works for the two waveforms (sine waves of 1 and 1.5 KHz). To get a good representation of a sine wave, you need to update more than 10 x faster than your fastest frequency... I would recommend x 100 if possible.

  Update frequency: 150 KHz

  Channels: 2

  Then create you stamps that include complete cycles of each wave you want to produce based on the frequency of update. These buffers must also be of the same size.

  Buffer 1: Contains data for the sine wave of 1 KHz, 300 points 2 cycles of sine wave

  Buffer 2: Contains data for the sine wave of 1.5 KHz, 300 points, 3 cycles of sine wave

  You can Interleave them as before. When the data are performed through the ADC, they are out different sine waves, even if the AO channels are updated at the same speed.