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Home -> Community -> Mailing Lists -> Oracle-L -> RE: SOME SOLUTIONS!
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_at_LIFE To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
TOUCH.COM> cc:
Sent by: Subject: RE: SOME SOLUTIONS!
root_at_fatcity.co
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.
dwilliams_at_lifetouch.com
-----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:Cherie_Machler_at_gelco.com> ]
Sent: Thursday, August 08, 2002 12:44 PM
To: ORACLE-L_at_fatcity.com
Cc: Paula_Stankus_at_doh.state.fl.us
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
Paula_Stankus_at_doh.s
tate.fl.us To: Multiple recipients
of
Sent by: cc:
root_at_fatcity.com 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-----
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
hth,
Jack
> ----
> | 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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com <http://www.orafaq.com> -- Author: Jack Silvey INET: jack_silvey_at_yahoo.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: DENNIS WILLIAMS INET: DWILLIAMS_at_LIFETOUCH.COM Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: Cherie_Machler_at_gelco.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Fri Aug 09 2002 - 08:28:21 CDT
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