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Sleep While You Append

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  • Sleep While You Append

    I have to do simple appends once a week and I hope the performance of appends and posts are improved with version 5. Tonight it took nearly 15 minutes to append 466 records with only 13 fields per record. The append works fine but having to wait so long is horrible. I am using the append records option from the menu. There is NO xbasic involved. Please improve the performance....

    Thanks

  • #2
    RE: Sleep While You Append

    Phillip,

    The append works fine (and fast), it's your mode of operation that is wrong. You can not have the table being appended to open by anyone (including the machine doing the append). I'll be dollars to doughnuts that you have a form open that references the same table you are appending.

    If you do have an append occuring while the table is open elsewhere, you are in a shared mode and the the speed decreases a bit. You were appending at a rate of about 1 record every 2 seconds. I would expect numbers like 5 to 10 per second, even on a slow system, so I suspect there is another issue as well,

    Regards,

    Ira J. Perlow
    Computer Systems Design & Associates
    [email protected]
    Regards,

    Ira J. Perlow
    Computer Systems Design


    CSDA A5 Products
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    • #3
      RE: Sleep While You Append

      I'll bet a doughnut that it could also be a matter of checking for duplicates and/or having a bunch of indices which need to be rebuilt. Not sure v5 can do anything to speed these things up.

      Ray

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      • #4
        RE: Sleep While You Append

        I don't think this is an ALPHA problem. I perform appends routinely in the Lab application I developed. These appends are much larger than what you indicated and they never take much longer than a minute or two.

        check your data for corruption, open tables (IRA's suggestion), bad indexes, mayabe make your filter keys indexes would speed thing up. It more than likely is a simple problem.

        Bob Sullivan

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        • #5
          RE: Sleep While You Append

          Ira, you may have hit the nail right on the head. I have a button on the form to perform the append and it is attached to the table that the data is being appended. What do you suggest as a work around for this? I want to have the table (by form) open in order to perform other checks once the data is appended. I try very hard not to have to keep jumping from one table to another to perform simple tasks.

          Thanks

          Comment


          • #6
            RE: Sleep While You Append

            Phillip,

            Most of the time, I have a "Dummy" table that has attached to it buttons and scripts that have operate various utility functions. In most case this is the "Main Menu" of my application. A Dummy table is typically a table that is not meant to store any real data, but just has a form or 2 attached to it to run other code. This would be the best way.

            That said, using batch_begin() and batch_end() around your code may make it work as if it's in exclusive mode. You may have to use an Xbasic version of your append operation though.

            Finally, as I suspected, a piece of code that starts executing will continue until the end of that code, even if the form it is attached to has been closed. Thus I tried something like this on a button on the form. It closed the form, ran the operation (silently in this case), and then reopened the same form.


            org_form=A_FORM_CURRENT
            parentform.Close()
            :Export.run_silent("testexp")
            Form.view(org_form)


            It temporarily closes the current form, and then reopens it. Ui_freeze() does not seem to freeze the action, so that will not help with the flashing.

            Regards,

            Ira J. Perlow
            Computer Systems Design & Associates
            [email protected]

            Regards,

            Ira J. Perlow
            Computer Systems Design


            CSDA A5 Products
            New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
            CSDA Barcode Functions

            CSDA Code Utility
            CSDA Screen Capture


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            • #7
              RE: Sleep While You Append

              I will give it a try and see what happens, it all makes sense.

              Thanks

              Comment


              • #8
                RE: Sleep While You Append

                Philip, please see my post:

                APPEND TIMES, REASONS, SOLUTION?

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                • #9
                  RE: Sleep While You Append

                  I know you weren't really responding to my message, but be sure to see Bill Warner's APPEND TIMES, REASONS, SOLUTION post. Running from a form, corrupt data, corrupt indexes, etc. are not the only things that can slow down an append. If a table is large, with lots of complex indexes and field rules, plus if you need to check for duplicates, be ready to go for a long lunch. Actually, I wish Alpha would build in the kind of options Bill talks about, e.g. bypass field rules or not, etc. As options, of course, not the default.

                  Ray

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                  • #10
                    RE: Sleep While You Append

                    Where would I find this post? I'm interested in reading it.



                    NATHAN

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                    • #11
                      RE: Sleep While You Append

                      Just down this forum list a bit. It's

                      Append times, reasons, solution?

                      by Bill Warner, original post 05-22-2001 10:59.

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