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Heng Xing Tian Tai Lab of Xi'an City (abbr, HXTT)

HXTT ACCESS
SLow
Rudi Mazzaro
2019-09-26 03:43:55.0
Hy
using old JBDC Bridge for MSAccess is faster than HXTT_Access.
I make some test and on same amount of data I need 1,30 minutes using JDBCBridge with HXTTAccess more then 7 minutes.
Is there an parameter to set ?
bye
Re:SLow
HXTT Support
2019-09-26 05:09:37.0
It's possibly resulted by query sql, which hasn't utilzied index.

What's your jdbc url and main sql?
Re:Re:SLow
Rudi Mazzaro
2019-09-26 11:34:05.0
Sorry what do you mean with

"It's possibly resulted by query sql, which hasn't utilzied index.
What's your jdbc url and main sql? "

My program is the same I onyl change the URL when connecting to the MDB file.

To connect to ACCESS MDB with JAVA JDBC is
jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=c:/temp/appoggio.mdb;}

To connect to ACCESS MDB with HXTTACCESS is
jdbc:access:///c:/temp/appoggio.mdb?delayedClose=0;lockType=ACCESS

To write in the MDB FILES I get 7000 records from my data and with INSERT INTO command I write data into MDB file.
Using JAVA JDBC is faster than HXTTACCESS .

So the only difference it that I use the JAVA JDBC or the HXTTACCESS URL rest of my program is the same for extract data to write into the MDB file.

Bye
Re:Re:Re:SLow
HXTT Support
2019-09-26 15:58:09.0
Try to remove delayedClose=0;lockType=ACCESS

Your test code should being reload total file for every insert operation, since there's only 7000 records.

Re:Re:Re:Re:SLow
Rudi Mazzaro
2019-09-26 23:49:38.0
If you read old tickets I have to use "delayedClose=0;lockType=ACCESS " because of corruption problems.

My prg doesn't load file for every insert operation...

Bye
Re:Re:Re:Re:Re:SLow
HXTT Support
2019-09-27 01:32:42.0
In my memory, corruption problem:
2019-09-18 fix a seldom index format compatible bug for level information of root node when it downgrade from index node to leaf node. It does not influence data, but MS Access will think it's incorrect.

So that you needn't concurrent lock check.
Re:Re:Re:Re:Re:Re:SLow
Rudi Mazzaro
2019-09-27 01:35:24.0
Ok I'll try to change connection without delayedClose=0;lockType=ACCESS...I'll let you know.

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