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Re-Indexing with Exclusive control

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    #1

    Re-Indexing with Exclusive control

    I find myself neeing to �re-index� quite often, but I have to boot everyone out of the system (20users+ in 3 locations) in order to do so. Is there a way to create a script that will get exclusive control of a table, and then re-index � without needing to kick them out of the system? This would save me a lot of headache if possible. I know there are read-write / exclusive commands, but I wouldn�t know how to use it with this or if it is possible.
    Tags: None
    #2
    Originally posted by programsplus
    I find myself neeing to �re-index� quite often, but I have to boot everyone out of the system (20users+ in 3 locations) in order to do so. Is there a way to create a script that will get exclusive control of a table, and then re-index � without needing to kick them out of the system? This would save me a lot of headache if possible. I know there are read-write / exclusive commands, but I wouldn�t know how to use it with this or if it is possible.
    No, exclusive is exclusive. You can't get exclusive use without having other users off.

    You probably need to try to determine the reason for needing to re-index so often. Are the three locations connected on one network or over some remote connection?
    There can be only one.

    Comment

      #3
      finding out why indexes constantly corrupt and have to re-index would be great - but not making much ground there. All 3 locations use a T Line to the main server which is a "Terminal Server". The more users that log on, the more likely i'll have to re-index. Almost as if it can't handle twenty+ people accessing the same stuff. Wish i knew why i need to re-index, but i don't.

      Comment

        #4
        Lynda

        Interesting if you combine the other posting that you have where you are doing quicksorts to prepare for a lookup.

        You may want to revisit that strategy and use the indexes as Tom Cone described. And an index oriented search will do a left to right closest match, so the complete value doesn't need to be typed in....

        If you are doing a quicksort each time you do a lookup or open a form, you are wasting a lot of CPU power and disc i/o's.

        There probaly isn't a lot of data in the system either... yet....
        Al Buchholz
        Bookwood Systems, LTD
        Weekly QReportBuilder Webinars Thursday 1 pm CST

        Occam's Razor - KISS
        Normalize till it hurts - De-normalize till it works.
        Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
        When we triage a problem it is much easier to read sample systems than to read a mind.
        "Make it as simple as possible, but not simpler."
        Albert Einstein

        http://www.iadn.com/images/media/iadn_member.png

        Comment

          #5
          thank you for this response. I guess i didn't understand the "quick sort" as such a cpu intensive feature. Does this mean that by using set index - it doesn't create a temp index each time? Could this really be part of our problem. I have probably 15 forms with these F4 / F5 buttons that do a quick sort and then find by key - with about 20 users using them all day long. Thank you so much for your response!

          Comment

            #6
            Originally posted by programsplus
            I guess i didn't understand the "quick sort" as such a cpu intensive feature.
            - A quick sort has to process every record in the table/set. Rather cpu and disk intensive.

            Originally posted by programsplus
            Does this mean that by using set index - it doesn't create a temp index each time?
            - yes

            Originally posted by programsplus
            Could this really be part of our problem.
            - yes

            If I understand the way you have programmed things, you have the F4 menu choice coded for each form. It quick sorts on a specified field and opens the find by key dialog to let the user quickly locate a record?

            If you change the script to set the index to the index for the same field and then open the find by key just as you do now, it should perform much faster with the same functionality and eliminate the multiple temp index issue.

            You will have to create index definitions for each field involved in the F4 lookups.
            There can be only one.

            Comment

              #7
              Yes, you are exactly correct and this is great feedback. I will begin to change my F4/F5 commands to the set index immediately. There are about 150 of them, so i'd better get moving. This may be something that is addressed in the newsletter because i wouldn't know as a "beginner/moderate" programmer that this happens. I see the feature is offered on the tool bar, i think - hey i can add those two features to one button and make it a one step - and not realize that i'm pounding my cpu more and more, the more i use it.

              This may help with many different things across the board!

              Comment

                #8
                Originally posted by programsplus
                Yes, you are exactly correct and this is great feedback. I will begin to change my F4/F5 commands to the set index immediately. There are about 150 of them, so i'd better get moving. This may be something that is addressed in the newsletter because i wouldn't know as a "beginner/moderate" programmer that this happens. I see the feature is offered on the tool bar, i think - hey i can add those two features to one button and make it a one step - and not realize that i'm pounding my cpu more and more, the more i use it.

                This may help with many different things across the board!
                Try one first before changing them all, of course. You could just create a button and put the two actions on it for trial purposes.
                There can be only one.

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