Hi there:
Reading from internet i found that the best way to use a database is
to connect and disconnect on every single database request, so if you
are loading a listbox manually from a database and on the same page,
loading a grid from the database, then the best way is to connect to
database, load the listbox, disconnect, connect again, load the grid
and disconnect.
what is the cause because to reconnect many times is more
efficient?.
I tried running some test on about it,connecting once on page request
is almost 20% more fast that connecting many times.
Also, i checked the number of session open on oracle and in both
method did keep the same number of session. In any case, aspnet will
keep many connections opens (persistent?). May be this method of open
and close for request is efficient with sqlserver but other database.
3  1418 
20 % from what ? Even 100 % wouldn't mean anything. If it's small enough
this is anyway non visible to the end user...
This is not really "more efficient". It just much simpler and it guarantees
that connection are released as soon as possible...
If you keep the connection opn :
- any failure to close the connection could cause problem
- it could be closed later than needed making this connection not available
even though not used
- if you have some processing between those openings, this particular
connection is not available even though not used at this time...
As most often this is a matter of trade off... The thing to check is if
your DB supports connection pooling...
--
Patrice
"jc" <jc*********@ya hoo.esa écrit dans le message de news: b5************* *************** **...legroups .com...
Hi there:
Reading from internet i found that the best way to use a database is
to connect and disconnect on every single database request, so if you
are loading a listbox manually from a database and on the same page,
loading a grid from the database, then the best way is to connect to
database, load the listbox, disconnect, connect again, load the grid
and disconnect.
what is the cause because to reconnect many times is more
efficient?.
I tried running some test on about it,connecting once on page request
is almost 20% more fast that connecting many times.
Also, i checked the number of session open on oracle and in both
method did keep the same number of session. In any case, aspnet will
keep many connections opens (persistent?). May be this method of open
and close for request is efficient with sqlserver but other database.
"jc" <jc*********@ya hoo.eswrote in message
news:b5******** *************** ***********@l1g 2000hsa.googleg roups.com...
Reading from internet i found that the best way to use a database is
to connect and disconnect on every single database request, so if you
are loading a listbox manually from a database and on the same page,
loading a grid from the database, then the best way is to connect to
database, load the listbox, disconnect, connect again, load the grid
and disconnect.
That's the generally accepted wisdom, yes...
what is the cause because to reconnect many times is more
efficient?.
Yes, because of a feature of ADO.NET called connection pooling. With web
applications, "little and often" is definitely the way to go...
I tried running some test on about it,connecting once on page request
is almost 20% more fast that connecting many times.
How are you creating / destroying the connections...?
In any case, ASP.NET will keep many connections opens (persistent?).
If your web app has persistent connections with your RDBMS, then you need to
rethink your connectivity method...
--
Mark Rae
ASP.NET MVP http://www.markrae.net This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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Best Regards,
Jassim Rahma
*** Sent via Developersdex http://www.developersdex.com ***
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