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Slow write operation

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    Slow write operation

    Two weeks ago we got problem with our application. Alpha Five worked, but any write operation took very long time.

    What we tried:
    - check the server and network statistic, just a little bit traffic
    - copy form linux server to other servers or local machine, no luck
    - compress database, no luck
    - rebuilding indexes, no luck
    - dictionary update, no luck
    - restore dictionary files .d* and set files .s* no luck
    - restore .adb file � success

    We compare the adb files and couldn't find any significant changes, except some path statements.

    Our standard path is \\linux-server\4all\datenbanken\a5_haup and other sub directories.
    The adb file path statements looks some times like this:
    \\linux-server\4all\DFNW9U~E\a5_haupt\kk.ddd# ##� )\\linux-server\4all\datenbanken\a5_haupt\#oo#.

    So we have two questions:

    1. Is there any issue with long path names in Alpha Five � could not find here on the messageboard. Can not remember any note elsewhere, but may be I missed.

    2. Somebody else who had comparable experience or any ideas?

    Cornelius

    #2
    Re: Slow write operation

    Cornelius, I have no idea about what�s happening.

    I would suggest to add on forms/browses a variable with the pathname so you can see when and where in your application these values are changed.

    As you almost have a double pathname look at your scripts and functions where you change the name of a subdirectory. How and where do you handle this? Can you Irrtumlicherweise find something like: Pathname = pathname + new pathname where you intended: pathname = new pathname?

    What changes are made in the Xbasiccode within forms and browses? Are they anyway acting correct?

    When and what happened the first time you discovered it and what was the last recently change in the application?

    Look at your directories. If Alpha added new entries like �kk.ddd� look at the date, time and other contents. If there are unpredictable results do they mean something to you?

    Do you use names with numerics for subdirectories like �12062012� or �1206� or �xyz06�?

    Good luck and do not forget to enjoy the footballmatch!

    Wiedersehen

    Ton
    Most things are simple but unfortunately only after the first time

    Comment


      #3
      Re: Slow write operation

      Hallo Ton, thank you for your reply.

      In fact we played around a lot with the foolish copy of our database, but couldn�t repeat that behavior of slow writing operation.
      My scripts use alias path specification or we use global variable, because my boss want to transfer the database to his laptop. We didn�t change any xbasic script, just layout tuning. So we inspect the adb files with the text editor to see, what the difference. At this time we saw the reduction of long path names. So we asked here at this forum.

      Look at your directories. If Alpha added new entries like �kk.ddd� look at the date, time and other contents. If there are unpredictable results do they mean something to you?
      Do you use names with numerics for subdirectories like �12062012� or �1206� or �xyz06�?
      No, neither. The time synchronisation with the server was o.k. and we don�t use numeric subdirectories.

      May be Alpha Five wasn�t the reason. Because the problem didn�t appear suddenly, it grows slowly within three days. I think the problem may be was a DNS issue. My knowledge at this isn�t so good and I haven�t a monitoring tool for that. We just could see, that the server wrote 200-300 kBytes/s. So the next improvement will be new hard-disk storage with a full raid controller. At the moment we renow our network cable and take off many little switches.


      Good luck and do not forget to enjoy the footballmatch!
      The winners enjoy every time ;-) - make a bet?

      Cornelius

      Comment


        #4
        Re: Slow write operation

        Is it an option just to test the behaviour of A5 on the laptop to find out if its a networkissue?
        Most things are simple but unfortunately only after the first time

        Comment


          #5
          Re: Slow write operation

          Originally posted by Ton Spies View Post
          Is it an option just to test the behaviour of A5 on the laptop to find out if its a networkissue?
          Local copy was working perfect. <hm>
          Other workstations had the same problem.

          Cornelius

          Comment


            #6
            Re: Slow write operation

            Cornelius,

            You might want to check your anti-virus (mal-ware) settings. Perhaps they changed recently. You will experience a slow down if your AV package is monitoring writes to the database directory.

            Comment


              #7
              Re: Slow write operation

              Hi Tom,

              the database directory is located on a linux-server, I don't think that the AV program will scan this directory.

              How ever, at this time we had some trouble with our Avira Professional Version. 3-4 computer didn't start at the morning.

              At least I got a new machine, now Windows 7 with more RAM, which is pretty fine working.
              Hope we will finish our network and server improvement in near future, I want to upgrade to Version 11.

              Thanks

              Cornelius

              Comment

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