B F wrote:
Hi all,Access will pull the entire tables across the internet and then query the data locally. This is what's taking all the time. Probably Access is requesting a lock until it gets the entire recordset(s).
I am having a problem with MySQL and I hope some nice guru can help me.
I am running MySQL server v3.23.49a on Red Hat Linux v7.1. I also need to run queries on Microsoft Access running on my Win2K machine, using a MyODBC connection over the Internet. However when I run certain queries my whole MySQL server hangs until the query is complete (up to 10 minutes). Thus my entire website hangs while I run reports. :(
My queries use around 5 tables with <100,000 rows in total. Perhaps my query is locking too many tables or using too many threads? I am certain that I am NOT using the maximum # of MySQL network connections (it is set to 1,000 and netstat reports <100 open connections). Is there a way to limit resources so that a single query doesn't bring my server to its knees?
Any and all replies are much appreciated.
Thanks in advance!
Barry
Set up pass-through queries from Access (or better still use ADO / VB).
To set up a pass-through query, design the query, switch to SQL mode, copy the text (Access sometimes deletes it at this next stage) and click Query ==> SQL Specific ==> Pass Through. Then edit the query properties, and set up your connection options to MySQL. You may have to edit the query to get rid of Access' "additions" (eg [] around everything).
This will make MySQL perform the query and send the results to Access, instead of having Access use MySQL as a dumb data storage device.
The second option (ADO / VB) is a bit more complicated but more versatile. I won't go into the details here, but you can search on the 'net for ADO - you'll find plently of examples.
Note that using Access to query MySQL over the internet isn't exactly secure. Someone correct me if I'm wrong here, but doesn't this send clear-text passwords across the internet?
--
Daniel Kasak
IT Developer
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