We have recently been testing our 3 tier Cayenne app with a larger
number of records and finding some performance problems with scale.
In particular we have a test database with 60,000 student records
(the production db will have 120,000). We are using paging (of 25
records) to ensure that
Hi Ari,
On May 25, 2007, at 8:11 AM, Aristedes Maniatis wrote:
Q1: So, my first question is why is Cayenne doing this? If paging
is switched on, shouldn't Cayenne be fetching only the primary keys
and then faulting in the particular records it needs in full?
The default strategy, as impleme
I had never used the paginated queries, but I would've bet money that it
fetched only the PKs initially and then fully resolved objects on a per-page
basis as needed. On large datasets, it is a big win (in time and memory) to
do it that way. On smaller datasets, it would be about a wash either w
On 25/05/2007, at 7:45 PM, Andrus Adamchik wrote:
The default strategy, as implemented by
org.apache.cayenne.access.IncrementalFaultList, is to run a full
query to fully resolve page #1, but only read id columns from the
result set for pages 2, 3, etc... This strategy bets that a single
On May 27, 2007, at 2:09 PM, Aristedes Maniatis wrote:
I don't quite understand what 'resolvesFirstPage()' refers to. Does
it mean 'firstPageResolved()'? Should it be negated here:
No. "resolvesFirstPage" really a shorthand for "is it possible to
reliably resolve objects on the first pag
On May 28, 2007, at 9:49 AM, Andrus Adamchik wrote:
I don't quite understand what 'resolvesFirstPage()' refers to.
Does it mean 'firstPageResolved()'? Should it be negated here:
No. "resolvesFirstPage" really a shorthand for "is it possible to
reliably resolve objects on the first page
On 28/05/2007, at 4:49 PM, Andrus Adamchik wrote:
No. "resolvesFirstPage" really a shorthand for "is it possible to
reliably resolve objects on the first page using the existing
algorithm".
OK. I guess I would have named it isFirstPageResolvable() or
canResolveFirstPage(). But from your
On May 28, 2007, at 1:50 PM, Aristedes Maniatis wrote:
On 28/05/2007, at 4:49 PM, Andrus Adamchik wrote:
No. "resolvesFirstPage" really a shorthand for "is it possible to
reliably resolve objects on the first page using the existing
algorithm".
OK. I guess I would have named it isFirstP
