Loosing cache !!

[Ologhai]

Hi all,

i've a problem with caching dataset,

i put this in application start to load dataset in cache memory.

Dim AD As New AgencyData()
Dim ds As DataSet = AD.AgencyCustomerList()

If IsNothing(Context.Cache.Get("AgencyCustomer&quot) Then
Context.Cache.Insert("AgencyCustomer", ds)
Else
Context.Cache.Item("AgencyCustomer&quot = ds
End If

this procedure is update every 20 min.

Dim aTimer As New System.Timers.Timer(1200000)
AddHandler aTimer.Elapsed, AddressOf OnTimedEvent
aTimer.AutoReset = True
aTimer.Enabled = True

Private Sub OnTimedEvent(ByVal sender As Object, ByVal e As System.Timers.ElapsedEventArgs)
Dim AD As New AgencyData()
Dim ds As DataSet = AD.AgencyCustomerList()

Context.Cache.Item("AgencyCustomer&quot = ds
End Sub

ok now my dataset is in my cache, i bind a datagrid on it, all work perfectly,

but after 1 or 2 min i lost my cache, and i wanna know why ?
to resolve it , i check if the "AgencyCustomer" is equal to nothing and i reload it, but it's not a solution for me. My dataset supose to be there until IIS retart.

someone can help me !!

thanks.
--------------------------------
Hugues Gauthier, DEC
Développeur Web

Intelligence Digital
1751 Richardson
Suite 4230
Montréal, Québec
H3K 1G6

http://www.intelligencedgt.com/

hgauthier@intelligencedgt.com
hugues_gauthier@hotmail.com

-------------------
ICQ: 2151800

 

[Isadore]

Hugues: I'm just a techncial level kind of person but here's a thought or two.

The cache is strongly dependent on available server resources and is proned to be wiped out by garbage collection if resources are up. From what I can remember from earlier reading I think one approach might be to set the priority higher on the cache item or increase your decay enumeration, e.g., here's an example from one of my books that sets a high priority (less likely to be removed) and slow decay (enumeration):

Cache.Insert ("myItem", _
"Hello", _
Nothing, _
Cache.NoAbsoluteExpiration, _
Cache.NoSlidingExpiration, _
CacheItemPriotity.High, _
CacheItemPriorityDecay.Slow, _
Nothing)

...just an idea or two.

 

[Ologhai]

Thanks Isadore

i set my cache with no expiration and priority high and it's work fine..


Dim Priority As Caching.CacheItemPriority
Context.Cache.Insert("AgencyCustomer", _
ds, _
Nothing, _
Context.Cache.NoAbsoluteExpiration, _
Context.Cache.NoSlidingExpiration, _
Priority.High, _
Nothing)
--------------------------------
Hugues Gauthier, DEC
Développeur Web

Intelligence Digital
1751 Richardson
Suite 4230
Montréal, Québec
H3K 1G6

http://www.intelligencedgt.com/

hgauthier@intelligencedgt.com
hugues_gauthier@hotmail.com

-------------------
ICQ: 2151800