Dennis,
The sales critter could give better pricing for Leccotech's SQL*Expert.
For a SWAG I believe it's less than a $1000 per seat and I believe that is
sold with a per-database component to the pricing.
I think there are also discounts when you buy more copies.
It was well worth what we paid for it, in the improvements we saw in
performance times for some of our worst-performing SQL.
They also have a full-featured tool called DB*Expert that is more expensive
and has more features. It's targetted more towards DBAs. SQL*Expert has
a target-audience of Developers.
Cherie
DENNIS WILLIAMS
<DWILLIAMS@LIFE To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
TOUCH.COM> cc:
Sent by: Subject: RE: SOME SOLUTIONS!
[EMAIL PROTECTED]
m
08/08/02 05:36
PM
Please respond
to ORACLE-L
Paula - I agree. I reviewed Quest's SQL Expert about a year ago and was
also
disappointed. The advice it gave seemed pretty shallow. It didn't seem to
suggest some of the newer Oracle features, for example. We didn't buy it.
Cherie - Thanks for the tip on SQL*Expert. Can you give us the ballpark
pricing, and whether that is per-seat or per-server? Thanks.
Dennis Williams
DBA
Lifetouch, Inc.
[EMAIL PROTECTED]
-----Original Message-----
Sent: Thursday, August 08, 2002 12:59 PM
To: Multiple recipients of list ORACLE-L
Wow,
Thanks for the advice. I have been using Quest's SQL Expert but it has
actually given me some bad advice and it doesn't seem to get to the level
that I am dealing with - bitmap conversion to rowid performance solutions.
Does anyone know if I am doing something wrong with the tool or if this
tool
would be better. It seems it would if it switches order of lines in code,
arithmetic changes... Does it support the new analytical functions in
Oracle, bitmapped indexes, etc.?
-----Original Message-----
<mailto:[EMAIL PROTECTED]> ]
Sent: Thursday, August 08, 2002 12:44 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Paula,
I'm sorry that I don't have an answer for you with regard to this
particular query. However, I've been using a SQL optimization tool
called SQL*Expert (or a more feature-rich tool called DB*Expert) that is
sold by Leccotech. I've had fantastic results with this tool and I can't
recommend it highly enough for SQL that is tough to tune manually.
The tool will generate a vast number of permutations of possible SQL that
contains switched order of lines in the code, arithmetic changes, moving
variables from one side of the equal sign to the other, and possible hints.
Once all these possibilites are generated, it is extremely easy to run
them, even with bind variables. You can even configure it that you want
to run all the options for a short period of time and stop trying them if
they don't succeed right away.
You can download a test copy and probably get a short-term key from the
sales rep within a day. It is pretty intuitive and I got it up and
running out-of-the-box within 24 hours. I believe their web site is
www.leccotech.com. They've got a button on there to register with them
and download the tool. Then you can contact the sales rep and have him
give you a short-term key before you can install.
Like I said, I've achieved super results tuning with this tool. It's
really cut down my tuning time and suggested alternatives that I would have
never thought of, not to mention whipping them all out in a very short
amount of time.
I should mention that I am not affiliated with the vendor, Leccotech, other
than as a customer.
Cherie Machler
Oracle DBA
Gelco Information Network
[EMAIL PROTECTED]
tate.fl.us To: Multiple recipients
of
list ORACLE-L <[EMAIL PROTECTED]>
Sent by: cc:
[EMAIL PROTECTED] Subject: RE: SOME
SOLUTIONS!
08/08/02 10:43 AM
Please respond to
ORACLE-L
Okay,
Just going from #1 query to #2 query went from subsecond response to 6
secs. Not to mention for each sum it gets progressively worse!!!. The
explain plan is exactly the same and I ran the sort query below and no rows
returned.
rem truncate table plan_table;
set timing on;
rem explain plan set statement_id='RON' for
select
/*+ INDEX(mv_birthstat,ndx_mvyr) */
brth_mthr_res_newco_code County,count(*),
-- sum(cert_chld_brth_year) Num1
--sum(decode(greatest(cert_chld_brth_year,1996),
least(cert_chld_brth_year,1998
), 1, 0)) / 3 Num2,
--sum(decode(greatest(cert_chld_brth_year,1997),
least(cert_chld_brth_year,1999
), 1, 0)) / 3 Num3
from mv_birthstat
where cert_chld_brth_year between '1995' and '1999'
and brth_mthr_res_state_code='10'
and brth_mthr_age between 15 and 41
group by brth_mthr_res_newco_code;
/*+ INDEX(mv_birthstat,ndx_mvyr) */
brth_mthr_res_newco_code County,
sum(cert_chld_brth_year) Num1
--sum(decode(greatest(cert_chld_brth_year,1996),
least(cert_chld_brth_year,1998
), 1, 0)) / 3 Num2,
--sum(decode(greatest(cert_chld_brth_year,1997),
least(cert_chld_brth_year,1999
), 1, 0)) / 3 Num3
from mv_birthstat
where cert_chld_brth_year between '1995' and '1999'
and brth_mthr_res_state_code='10'
and brth_mthr_age between 15 and 41
group by brth_mthr_res_newco_code;
WHY WHY WHY WHY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-----Original Message-----
<mailto:[EMAIL PROTECTED]> ]
Sent: Wednesday, August 07, 2002 11:37 PM
To: Multiple recipients of list ORACLE-L
Paula,
Sorry to join this thread late, if I am rehashing just
igonre.
I notice that your 'numbers' are surrounded by quotes,
which will implicitly disable the index on those
columns, perhaps the cause of the index hint. Are
those columns text or numbers? If numbers, take out
the quotes (and perhaps the hint) and rerun query.
Also, your aggregate functions will cause sorting -
are you sorting to disk? See the query at the end of
this to find out. If so, perhaps a larger
sort_area_size and sort_area_retained_size might be in
order.
Again, ignore if redundant.
Run this to look at sorting:
select t1.tablespace
, extents
, sum( t1.blocks * to_number( t3.value ) ) / 1024 /
1024 mb_used
, sum( t1.extents ) tot_extents
, t2.username
, t2.osuser
, t2.SID ||','|| t2.serial# SID_PID
, t4.spid
, t5.sql_text
, t1.segtype
from
v$sort_usage t1
,v$session t2
,v$parameter t3
,v$process t4
,v$sqlarea t5
where t1.SESSION_ADDR = t2.SADDR
and t3.name = 'db_block_size'
and (t2.PROCESS=t4.SPID or t2.paddr = t4.addr)
and t2.sql_address=t5.address
and t2.status = 'ACTIVE'
group by
t1.tablespace
, t2.username
, t2.osuser
, t2.machine
, t2.schemaname
, t2.program
, t2.SID ||','|| t2.serial#
, t4.spid
, t5.sql_text
, t1.segtype
, segfile#
, extents
/
hth,
Jack
--- [EMAIL PROTECTED] wrote:
> Guys,
>
> By changing objects to noparallel, creating
> bitmapped index containing all
> columns that was local and prefixed. Moving to
> 8.1.7.4 I was able to
> improve performance from minutes to many seconds to
> seconds for the
> following (not using 'in' or 'or' in predicate
> helped too):
> select
> /*+ INDEX(mv_birthstat,ndx_mvyr) */
> brth_mthr_res_newco_code County,count(*)
> from mv_birthstat
> where cert_chld_brth_year between '1995' and '1999'
> and brth_mthr_res_state_code='10'
> and brth_mthr_age between 15 and 41
> group by brth_mthr_res_newco_code;
>
> Then adding the following the query takes 15 seconds
> again - any ideas for
> speeding it up? Please don't say hire a new DBA. I
> have really been
> working on this hard with only annoying input from
> Oracle's technical
> support and a lot of good reference manuals
> (Jonathon Lewis, 101 Perf.
> Tuning, Oracle SQL - Guy Harrison) for my
> companions. Great I know but
> lonely.
>
> select
> /*+ INDEX(mv_birthstat,ndx_mvyr) */
> brth_mthr_res_newco_code County
> sum(decode(greatest(cert_chld_birth_year,1995),
> least(cert_chld_birth_year,1997), 1, 0)) / 3 Num1,
> sum(decode(greatest(cert_chld_birth_year,1996),
> least(cert_chld_birth_year,1998), 1, 0)) / 3 Num2,
> sum(decode(greatest(cert_chld_birth_year,1997),
> least(cert_chld_birth_year,1999), 1, 0)) / 3 Num3
> from mv_birthstat
> where cert_chld_brth_year between '1995' and '1999'
> and brth_mthr_res_state_code='10'
> and brth_mthr_age between 15 and 41
> group by brth_mthr_res_newco_code;
>
> I am going to try the sums in a outer query.
>
>
>
> -----Original Message-----
> Sent: Wednesday, August 07, 2002 4:45 PM
> To: Stankus, Paula G; '[EMAIL PROTECTED]'
>
>
> Mother's state 80% are in Florida. However, this is
> a 'local' prefixed
> bitmap index. I would expect to use year to
> eliminate partion. then w/in
> year by state - second col. in query.
>
> -----Original Message-----
> Sent: Wednesday, August 07, 2002 4:35 PM
> To: Stankus, Paula G; '[EMAIL PROTECTED]'
>
>
> BTW,
>
> SQL> select blocks from dba_tables
> 2 where table_name = 'MV_BIRTHSTAT';
>
> BLOCKS
> ----------
> 236542
>
> SQL> select clustering_factor from user_indexes
> 2 where table_name='MV_BIRTHSTAT';
>
> CLUSTERING_FACTOR
> -----------------
> 1657
> 170
>
> -----Original Message-----
> Sent: Wednesday, August 07, 2002 4:28 PM
> To: Stankus, Paula G; '[EMAIL PROTECTED]'
>
>
> Help - weird performance problem!!!
>
>
----------------------------------------------------------------------------
> ----
> | Operation | Name | Rows |
> Bytes| Cost | Pstart|
> Pstop |
>
----------------------------------------------------------------------------
> ----
> | SELECT STATEMENT | | 1 |
> 5 | 9331 | |
> |
> | SORT AGGREGATE | | 1 |
> 5 | | |
> |
> | SORT AGGREGATE | | 1 |
> 5 | | |
> |
> | INLIST ITERATOR | | |
> | | |
> |
> | PARTITION RANGE ITERAT| | |
> | |KEY(I)
> |KEY(I) |
> | BITMAP CONVERSION COU| | |
> | | |
> |
> | BITMAP INDEX RANGE S|NDX_MVYRS | |
> | |KEY(I)
> |KEY(I) |
>
> Cost higher but less than a second.
>
> Ignore the cost - higher cost was sign.
> Faster!!!!!Does Key(*) mean it is
> doing part. Elimin. I think so but can you see the
> inlist?
>
> Very fast with all years involved. Then added
> predicate:
>
> select
> /*+ INDEX(mv_birthstat,ndx_mvyrstatecoage) */
> count(*) from mv_birthstat
> where cert_chld_brth_year
> in('1995','1996','1997','1998','1999')
> and brth_MTHR_res_STATE_CODE = '10';
>
> - snails crawl by just adding the additional
> column!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
__________________________________________________
Do You Yahoo!?
Yahoo! Health - Feel better, live better
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