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Posted to derby-user@db.apache.org by Melissa Mifsud <me...@gmail.com> on 2014/01/10 05:40:09 UTC

Setting derby.storage.pageSize

Version: 10.10.1.1 (Embedded)

I have been trying to set the derby.storage.pageSize on an index according
to http://db.apache.org/derby/docs/10.10/ref/rrefproper40688.html in the
hope that increasing the pageSize will help with a large insert/update.

It seems the value doesn't seem to be changing. The relevant part of my
script is:

call
SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.storage.pageSize','16384');
-- CREATE TABLE DataSource...
CREATE INDEX dataSource_path_idx ON DataSource(connectorId, path);
select p, syscs_util.syscs_get_database_property(p) from (values
'derby.storage.pageCacheSize', 'derby.storage.pageSize') props(p);
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.storage.pageSize',
'4096');
select p, syscs_util.syscs_get_database_property(p) from (values
'derby.storage.pageCacheSize', 'derby.storage.pageSize') props(p);


Both selects give the same output:
P                                         |2


-----------------------------------------------------------------------------------
derby.storage.pageCacheSize               |4000

derby.storage.pageSize                    |NULL


So I have (earlier in the script) changed the pageCacheSize property using
SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY but the pageSize does not change.
Running select pagesize from table (syscs_diag.space_table('APP',
'DataSource')) s; returns no rows.

   1. Is there a way to check what the pageSize of an index is?
   2. Is there some other way I should be setting the pageSize property?


Thanks,
Melissa

Re: Setting derby.storage.pageSize

Posted by mike matrigali <mi...@gmail.com>.

check out the following to see page size of table and indexes:
http://db.apache.org/derby/docs/10.10/ref/rrefsyscsdiagspacetable.html

On 1/9/2014 8:40 PM, Melissa Mifsud wrote:
> Version: 10.10.1.1 (Embedded)
>
> I have been trying to set the derby.storage.pageSize on an index
> according to
> http://db.apache.org/derby/docs/10.10/ref/rrefproper40688.html in the
> hope that increasing the pageSize will help with a large insert/update.
>
> It seems the value doesn't seem to be changing. The relevant part of my
> script is:
>
> call
> SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.storage.pageSize','16384');
> -- CREATE TABLE DataSource...
> CREATE INDEX dataSource_path_idx ON DataSource(connectorId, path);
> select p, syscs_util.syscs_get_database_property(p) from (values
> 'derby.storage.pageCacheSize', 'derby.storage.pageSize') props(p);
> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.storage.pageSize',
> '4096');
> select p, syscs_util.syscs_get_database_property(p) from (values
> 'derby.storage.pageCacheSize', 'derby.storage.pageSize') props(p);
>
>
> Both selects give the same output:
> P                                         |2
> -----------------------------------------------------------------------------------
> derby.storage.pageCacheSize               |4000
> derby.storage.pageSize                    |NULL
>
>
> So I have (earlier in the script) changed the pageCacheSize property
> using SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY but the pageSize does not
> change.
> Running select pagesize from table (syscs_diag.space_table('APP',
> 'DataSource')) s; returns no rows.
>
>  1. Is there a way to check what the pageSize of an index is?
>  2. Is there some other way I should be setting the pageSize property?
>
>
> Thanks,
> Melissa
> **
>
>