How would you suggest to have the session management pattern?
On 17 Mar, 14:23, Fabio Maulo <[email protected]> wrote:
> 2009/3/17 Utopico <[email protected]>
>
>
>
> > Ok. Thank you very much.
>
> > I guess the second-level cache will not be cleared during this
> > process?
>
> No man.... not the cache but the session-cache.
> BTW change you session management pattern.
>
>
>
>
>
> > On 17 Mar, 14:00, Oskar Berggren <[email protected]> wrote:
> > > If you're interested you could have a look at the numbers in
> > > ISession.Statistics for an idea about how big your session has become.
>
> > > /Oskar
>
> > > 2009/3/17 Fabio Maulo <[email protected]>
>
> > > > open and close the nh-session for each message/operation.
>
> > > > 2009/3/17 Utopico <[email protected]>
>
> > > >> In a real application there would be many datasources reporting data
> > > >> (at less frequent intervals). So how would you suggest to handle the
> > > >> session in this case? A realistic scenario would about 30 datasources
> > > >> reporting data every 60 minutes.
>
> > > >> On 17 Mar, 12:16, Oskar Berggren <[email protected]> wrote:
> > > >> > Session is not really meant to be long running. Try creating a new
> > > >> session
> > > >> > for each "run" or at least clear the sessions cache.
>
> > > >> > /Oskar
>
> > > >> > 2009/3/17 Utopico <[email protected]>
>
> > > >> > > Using same session (at least th. I have now done a bit more
> > > >> > > monitoring. And it seems that the CPU and memory load is
> > increasing
> > > >> > > over time while the actual disc writes does not. Also the
> > performance
> > > >> > > of the database server does not seem to change when monitoring the
> > > >> > > database directly while the application is running.
>
> > > >> > > On 17 Mar, 11:07, Ayende Rahien <[email protected]> wrote:
> > > >> > > > Are you using the same session? Or creating a session every
> > time?
>
> > > >> > > > On Tue, Mar 17, 2009 at 11:31 AM, Utopico <
> > [email protected]>
> > > >> > > wrote:
>
> > > >> > > > > I have used hibernate for about half a year, but not with very
> > > >> high
> > > >> > > > > load. Yesterday I had an application running that slowed down
> > > >> > > > > significantly after running through the night (from fraction
> > of a
> > > >> > > > > second to 10-15 seconds). I am pretty sure that there is
> > somthing
> > > >> can
> > > >> > > > > be done to improve this, or a way to find out what is the
> > cause. I
> > > >> > > > > need some help with this.
>
> > > >> > > > > So for my application
> > > >> > > > > * I use NHibernate 2.0.0.GA
> > > >> > > > > * Visual studio 2008
> > > >> > > > > * FirebirdSQL 2.0
> > > >> > > > > * received data every 15 seconds on a serial port which is
> > then
> > > >> > > > > decoded. This results in:
> > > >> > > > > - check for datatype (cached query through SysCache since
> > these
> > > >> > > > > values are updated seldom, but checked often) and possible
> > > >> addition of
> > > >> > > > > new datatype entry (each datavalue has a datatype associated
> > with
> > > >> it)
> > > >> > > > > - using sequence generator for ID on datavalue and
> > dataobject
> > > >> > > > > - insert of a dataobject which has about 120 values
> > associated
> > > >> as
> > > >> > > > > follows (results in one dataobject insert and 120 inserts:
> > > >> > > > > [NHibernate.Mapping.Attributes.Bag(Table =
> > "DATA_VALUE",
> > > >> > > > > Inverse = true, Lazy = true, OrderBy = "TYPE_ID ASC, IDX ASC",
> > > >> Cascade
> > > >> > > > > = "all-delete-orphan")]
> > > >> > > > > [NHibernate.Mapping.Attributes.Key(1, Column =
> > "REC_ID")]
> > > >> > > > > [NHibernate.Mapping.Attributes.OneToMany(2, ClassType =
> > > >> typeof
> > > >> > > > > (Nortek.SeaState.Domain.DataValue))]
> > > >> > > > > public virtual IList<DataValue> Values
> > > >> > > > > {
> > > >> > > > > get
> > > >> > > > > {
> > > >> > > > > return this._values;
> > > >> > > > > }
> > > >> > > > > set
> > > >> > > > > {
> > > >> > > > > this._values = value;
> > > >> > > > > }
> > > >> > > > > }
> > > >> > > > > * All the above is inclosed in a transaction with ReadCommited
>
> > > >> > > > > Would I benefit from batch inserts or any other performance
> > trick?
> > > >> Or
> > > >> > > > > is there some stupid flaw in my way of using hibernate?
>
> > > > --
> > > > Fabio Maulo
>
> --
> Fabio Maulo
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