Performance Issue Causing Access To Crash And Burn
Nov 2, 2005
Hi folks!
I've been experiencing a very frustrating problem recently.
One of my databases crahes randomly, and I'd like to know if some of you have tips to helps me.
The database is splited in front-end and back-end, both on the server. I know keeping the front-end on the client PC will improve performance, but due to a high number of users (about 60 to 80) and the need of doing frequent updates, installing the front-end on each machines is not an option for now.
Users are not all directly connected to the server. Those who are directly connecte4d to the server (in building A) have no problem. Those who don't (building B) have extensive lags on opening (about 30 seconds), and on about anything that calls an heavy query, most often leeding to a crash. Access display the message telling that the datbase needs to be repaired and restart.
I tryed several thing to improve my queries, like eleminating most of GROUP BY and UNIQUE clauses and avoiding the use of functions.
I have a lot of conditional formatting in the forms, but I don't think this is the problem, since it is executed on the local machine (as far as I know).
My theory is that the lags cause some call to the DB to timeout. I just dont know how to fix that. Is there an option to higher the timeout delay?
My other theory is that the problem is caused by dropped packets during the connection to the DB. I tryed downloading large files (100Mb to 250Mb) from the server several times and never had a problem. Although the connection is quite slow, the ping is very small, like below 10ms to 20ms. Is there better ways to test a network connection, if possible without installing software (limited rights on the machine)?
Would using Replicas be a solution? What are the pros and cons of it? I never used them and know very little about it. My idea would be of putting a back-end on both servers, but I guess the data would not be as live.
BTW, I am using Access 2002 (2000 file format) on an XP SP2 PC.
Thanks to all of you patient enough to read all of this! I Hope some of you have some awnsers, tips or tricks!
I have a DB which has been up and running with no problems for a couple of months.
A couple of users have recently had new machines installed. These are XP SP2 with Office 2000.
The Database FE is on the PC and the Backend is on the server.
When FE is first downloaded and opened it runs fine. The second time you go in the DB gets by the Splash screen but then crashes on the Title Menu. If you then recopy the FE to the machine it opens fine the first time then crashes again on the second attempt.
I have checked the references and all ok. I have full error trapping on the Splash screen and the Title Menu yet I just get the error "Access has encountered an error and needs to close..."
It runs fine on my machine which is XP SP2 with Office 2002. Has anyone any suggestions that I can check or repair this?
It seems to be quite simple really. Make a form for Orders and add a subform for Order items. Write some VB code to chage values on the Order form when an Order item is added or amended. Add a "Find" dropdown to the Order form to find particular Order numbers.
Run the form and add/amend orders and items. This will work OK. Move to the next or subsequent order using the "Next" button. Add/Amend again - no problem. Drop down the "Find" control, select an order and the correct order comes up on the form. Amend an item. As the code attempts to change a text box on the Order form Access crashes.
The same code (to add up the items, take off discount and add on tax) can be run after a "Find" by changing a "Discount %" text box on the Order form and this works OK. Perhaps the Order form needs to be in focus for the code to work but I cannot see why this should be so.
In fact you don't actually need the "Find" dropdown. Any code that moves to another Order record programatically will cause Access to crash when an item is added/edited subsequently.
Making it crash is simple but stopping it has cost me a couple of days of frustation. Has anybody any ideas?
My Access 2000 project crashed and the computer dutifully asked to report the error to Microsoft, so I let it run. I then looked at the subsequent screen and was surprised. Well - silly me, maybe I shouldn't have been.:mad:
This screen simply said that Access 2000 was in "extended support" and my "solution" was to upgrade to a newer version. This was a bit irritating since the purpose of reporting feedback is to provide an opportunity to fix program bugs. So why ask the user to provide an error report if that report will simply be ignored and only used for a sales pitch.
While Microsoft has every right to discontinue product development, I would hope that they would still try to fix bugs that cause a program to crash. I guess Microsoft's quality control department has been outsourced to the same company that Dilbert works for. Additionally, I find euphemisms, such as "extended support" for "You are out of any help options, tough luck" to be quite irritating. Why not directly admit that we are on our own.
Also I am still on a slow boil over over the last six years by the fact that help for DAO/ADO disappeared from Access 2000 help which was in Acess97 help and Microsoft never got around to making it available as an update.
So, my database appeared to be working OK yesterday however I occasionally saw an error in my "Update Event" script on one of my combo boxes. today, now when I try the combo box, I get a immediate crash.If im assuming its the same combo box, here is the code for that box:
Code:
Private Sub MCAcmb_AfterUpdate() Me.Model.RowSource = "SELECT DISTINCT [tbl].Record, [tbl].Model" & _ " FROM [tbl] WHERE Record = '" & Me.Recordcmb.Value & _ "' ORDER BY Model"
[code]...
I recently added a header...just tried it again and got the error:"The expression After Update you entered as the event property setting produced the following error:Object or class does not support the set of events."however I got it to work by entering VB, adding a space, removing it and then saving and entering the form view the form worked as normal. when i close and reload, i get the error again
focking pissed off. i want to add an image to a some forms, the database is all working and that. but when i put a picture in in the design view and then go to view it the whole thing crashs. i nearly lost the whole data base from putting one on the home page, thank fock i had a back up and now ionly have to redo one form as the other one wont open anymore it will just crash every time i try to open it. i have no idea whats going on, i have other images that i put on it before, but i cant put any on now. anyone every encounted this and how do i over come it!
I've got a bit of a problem with linking a text box to a ComboBox. I have an employee name in a field [EmployeeName] that sits in the Header of a Form. (This is so I can show multiple records for that employee without having their name repeated at each one). I also have the name of contact [ContactName] that sits in the Detail area of the form.Both names come from their own tables that have all their contact numbers and e-mail addresses in columns I have linked the name to text boxes [ContactPhone] & [EmployeePhone] with their relevant phone numbers in within the Detail area of the form.
The ContactPhone that has the ContactName within the Details part of the form works well with no problems by putting =[ContactName].Column(1) in the Control Source
However when I put =[EmployeeName].Column(1) in the relevant Control Source (and / or EmployeeEMail in a second text box), once I have saved the form in Design view and returned to Form view, Access crashes and shuts down!If I remove the wording from the control source Access doesn't crash.
Hi, I have been using "fSetAccessWindow (SW_HIDDEN)" in the open event of my main switchboard to hide the grey Access screen from being visible behind forms, reports, etc in this db. But when I started using a .vbs script file to launch the db, the Access window stopped being hidden. (The reason I use the script for launching is that it temporarily sets the db's security level to 1 which stops the macro security warning from coming up.) Apparently MS knows about this happening and released a technique to rectify the situation, but I don't understand their instructions. It looks like they expect one to have more understanding than I have. Could someone help me get this impliemented? Here is the article: http://support.microsoft.com/kb/167659/en-us Thanks!
I'm starting a year-long university project which will be written in c#. The client app will be run on a LAN, with 35-40 users accessing the database concurrently, connecting to a database held on the server.
Could anyone tell me if Access can withstand 35-40 users at the same time? I found out that the maximum amount of users is 255, but what kind of performance impact(if any) will there be with 35-40?
I've searched all over the Internet for this, but I can only find references to using access behind a website, which isnt quite what I need. Any help would be great.
Have a few questions after I ran the Access performance analyzer. Now these ideas are they good or just some generic recommendations. Dont know if I should take care of all these or not?
Anyone know if I should do all these things and about how I should do it?
Hello, I am attempting to convert some Access XP MDB files to Access 2007. I am experience some horrendous performance problems. We are a bit unusual in that we use Access as a RAD tool and almost all of our data resides in Oracle tables linked to by our Access front ends.
The issue I am experiencing concerns opening tables in the UI. If I open a table by double clicking it, a datasheet view is displayed (rather quickly) as usual, filling the page with information. The UI is responsive while Access populates its recordset in the background. (e.g. the the record count on the record navagtion bar is not displayed). As soon as I click in a column defined as a date, the UI hangs, network trafic and CPU usage rise dramatically and the Access Window displays "not responding". It appears that Access is attempting to retrieve all the rows in the table. After 3 minutes or so, the UI becomes responsive, CPU and Network traffic return to normal and the record count is now displayed (roughly 900K records).
This is "bad" (and also not what Office XP did). Please can anyone help?
I have an Access datebase, where main tables are built and saved.
Also, I have 2 Access modules, which access informations in main tables in an Access datebase (I used Linking to table) and process information in query.
Questions: Linking to tables in another datebases will make perfomance of the module worse ? If the answer is Yes, then in which scale ?
Hi all, I am programming a database that contains approximately 3700 records stored in a relational table structure.
When I split the database and moved the tables to the server side, my performance worsened drastically: a query that runs in under 5 seconds when the tables are on the client side takes over 45 seconds in the split database (with tables on the server side).
I've tried a variety of solutions (including changing the subdatasheet name property to [None] in the tables, creating an MDE file from the MDB file), but they haven't helped much.
Any suggestions about how to speed performance are greatly appreciated! Thanks so much!
I am trying to link an excel file (.xlsb) into Access 2013 running on Windows 8 (External Data-->Excel). It will first act like it's working, but it will just shut Access down after a couple seconds of churning and ask for a Backup to be created or it will restart (no rhyme or reason as to which you will get). I've tried a Compact and Repair. I've tried rebooting. I've tried renaming the excel file(although I have other files with the same naming convention linked), but no matter what I do, it will not accept it. I've tried doing just a straight Import....same results. This file, along with a others that are already linked in this database, are stored on a network server.
We are encountering severe performance problems when running our access database on our Network.
Symptom:
Huge drop off in performance when 2nd and subsequent users refresh links to chosen back end database. If the database is opened by another users front end database.
Takes up to 10 minutes to refresh the links to 120 tables in Back-end MDB database.
The system is designed as a split front and backend Access database. The back-end Data MDB database is located on a Windows 2000 server.
The first time a user logs on they are required to locate and Re- Link the tables from the back-end database which holds data for the current year. If they wish to work on another year they re-link the tables from the relevant back end database.
When running locally the Front end takes between 5 and 10 seconds to refresh ALL the links to around 130 tables.
When the back end is on a network drive the process takes about twice as long. But is still quick.
If another user has the file open via their own (locally held) front end, then the refresh link process takes between 5 and 10 seconds PER TABLE !!
This means that that it takes up to 10 minutes to complete the re-link. Same behaviour if using Linked table Manager or refresh links using code
As soon as second user logs out of database the refresh link process speeds up.
The behaviour has been observed on a variety of servers and customer networks.
General data access is also much slower after 2nd user - but just about bearable. Data files are small – few records – occupy 7mb on disk.
Development Platforms – Windows XP / 200 clients, Windows 2000 Server hosts the back end database.
Front end is Access XP (MDB or MDE File) with al the latest service packs and security updates installed.
We have experienced this problem with a number of different systems running in various environments. But this wasn’t a problem with the old Access 1 database
HELP! Access should be able to support 10 – 20 users - we can barely run 2!
I have an Access 2010 database .. and will be adding about 25,000 records a day to it. So it will get pretty big fast .. so 9 million a year. Is this too big for Access ?? Or is it more a issue of file size .. I know that Access 2010 can go up to 2 GB. I am interested in how I can maximize my performance and not have the database.The data is as follows .. One table. The other tables will be small, just this one will increase in size really.
Id .. Autonumber (primary key) When .. datetime Radio .. integer (indexed .. w duplicates) Group .. integer (indexed .. w duplicates) Type .. text 4 TransType .. text 2
I am considering a purge of old records if needed .. like only keeping the most previous 5 million records or some reasonable number. Like .. then I would think I should try to number my records backwards (using long int rather than autonumber and number records backwards on import) .. ie record 1 would be the most recent one and only keep the last X number of them for performance reasons.
Yesterday my database crashed. It is the 'DEV' version for my application - so all of the current fixes/changes are in there and I have forgotten to backup!
It crashes when ever I try to enter the VBA editor, or build code. This occurred after a minor problem running some code (I forget which code).
The same occurs when I try to get into the code builder in the repaired version access generates...I have also tried using compact & repair to get in - but still no joy.
Can anyone offer any advice workaround to get this up and running again?
I am managing a traffic database and have currently constructed a series of queries that list average vehicle speed and total volume in five-minute intervals over the course of several months. From each of these queries, I need to create a subquery that, for each time interval, will simply average all speed values and sum all volumes into one record. Fields are: Time, Avg Of Speed, Sum Of Volume.
I created the subquery like so: SELECT DISTINCTROW [Speed Weekday (2 SB)].Time, Avg([Speed Weekday (2 SB)].Speed) AS [Avg Of Speed], Sum([Speed Weekday (2 SB)].Volume) AS [Sum Of Volume] FROM [Speed Weekday (2 SB)] GROUP BY [Speed Weekday (2 SB)].Time;
When I attempt to switch to datasheet view though, Access locks up every time and I am forced to end the program through the task manager. The query I'm referencing [Speed Weekday (2 SB)] has only 4800 records thus far, so it isn't a ridiculous amount of data. Any advice as to what is going wrong? Thanks in advance for any help!
have a form that uses comb boxes. Now the combo box is Label "Tank Size" and looks up it's values in a Table named "Tank Size" and stores the one you pick say 2500. Now the problem. In the "Tank Size" table the row also has the price in the next column. So when someone picks 2500 in the combo box it will also list the price in say a text box or something next to the combo box. I hope i explained it o.k.
My application crashes when trying to change the value of a text box in a continuous form. Here is the code:
Code: Private Sub cboPoCurrency_AfterUpdate() On Error GoTo ErrHandler Dim rst As Recordset
[Code].....
If I replace .txtUnitCost by MsgBox .txtUnitCost, it loops correctly through each record and returns the value. But if I try to change the value as shown in above code, MS Access crashes! (This is a desktop application with tables linked to SP lists - not a web app)
I have a database that runs a macro/report every 2 hours, however our network has been up and down lately. This causes the macro to fail when trying to log into the system because the table that is storing your username is no longer in the database. When I check, all tables, linked tables, forms, reports, macros and modules are all gone. I find the only way to get them back is to close the database and reopen.
What I want is a way to reconnect the objects without closing and reopening.
I have a main form [mainform] with several subforms on it, two of which are on a tab.
On the second tab [page79] there is a subform [subformlist] which has like 25 checkboxes on it, any combonation of which can be picked by the user.
I need there to be at least one pick required of this subform, else the record won't show in a general query I have, since the table the subform is based on is linked to the record.
Is there anyway to make making a choice of one of at least one of these checkboxes checked a manditory thing before the user can close or move on to the next record?
I've tried making an "Other" box that on the Table has a default value of "True" which I thought would cause it to show in the query record...to no avail.
The only true way to make this work is to have it mandatory that the user pick from AT LEAST one, usually more before the record is complete.
Any help? Other than writing a MASSIVE If...Then statement...?
Or is there a way to make it so the choice isn't required for the record to show up in the query?
I'd post...but my db is too massive, even zipped. :(
Could having two look up queries, one on form an the other on table, and both of them take info from the same field and store it in a different field on a different table slow the DB? :)
case 1: Link the SQL Server tables to MS Access (mdb file) - there are 50 concurrent users access in the same file (network share drive).
case 2: create adp file - there are 50 concurrent users access in the same file (network share drive).
I know if each client has own copy on his local machine, it will not have any problem. But, if we want to put one file only in the sharing drive, then if either the client or server computer (or the connection between them) fails during the transaction or other operation that writes to the database file, which case is better to solve?
