Consistent gets are reduced but elapsed time is increased.

Hi All,
While tuning a application my consistent gets are reduced by 50% but the query is still taking the same time.
In a Warehouse env data is coming from With clause that is having some 40000 rows .Then these 40K rows are joined to a table that is having 2 Billion records having indexes on primary key and date column(bitmap)indexes .

This forum is for issues with the SQL Developer tool. You'd get more response in the General Database forum.
Have fun,
K.

Similar Messages

  • Consistent gets are reduced by 50% but the query taking more elapsed time.

    Hi All,
    While tuning a application my consistent gets are reduced by 50% but the query is still taking the same time.
    In a Warehouse env data is coming from With clause that is having some 40000 rows .Then these 40K rows are joined to a table that is having 2 Billion records having indexes on primary key and date column(bitmap)indexes .
    It is using Hash Joining method.

    Try forcing a hash join, if possible:
    http://dba-oracle.com/tips_oracle_hash_joins.htm
    Can you post the plans?
    http://www.dba-oracle.com/plsql/t_plsql_plans.htm

  • Consistent gets are reduced by 50% but the query is still taking the same t

    Hi ,
    I am tuning a query in DWH env using a WITH clause .Doing that my consistent gets are reduced by 50% but the elapsed time in increased.
    In that one 40000 rows are coming from WITH clause and joined with a table having 250000000 rows joined through Hash join.
    can anybody help me out in this issue.
    Thanx
    Nitin

    NitinMishra wrote:
    Hi ,
    I am tuning a query in DWH env using a WITH clause .Doing that my consistent gets are reduced by 50% but the elapsed time in increased.Unusual! Normally time goes, down when system resources do - but not always as you are seeing :(. Last time I saw something like this the reads had gone down but the CPU usage had gone up. You can get CPU usage from V$SQL.
    Can you post the query, the execution plan, and statistics - both before and after the tuning?

  • How to get Sum for my Elapse Time string for my group

    Hi,
    How can I get the sum of an elapse time string in my group footer 2 and group footer 1 from the report screenshot attached.
    I have a report that display TimeIn and TimeOut of an employee.
    For the total time I have created a formula that will take my time in seconds and displaying it in hrs, minutes and seconds.
    How can I get the sum of all the total time per day and display this in my group footer 2.
    As well I will need to add the grand total to group footer 1 for the total of days.
    The formula I have for the total time is as follow:
    WhileReadingRecords;
    NumberVar TotalSec :=  {TimeLogs.TotalTime};
    NumberVar Hours   := Truncate  (Remainder ( TotalSec , 86400) / 3600) ;
    NumberVar Minutes := Truncate  (Remainder ( TotalSec , 3600) / 60) ;
    NumberVar Seconds := Remainder (TotalSec , 60) ;
    Totext ( Hours ,   '00' ) +  ':' +
    Totext ( Minutes , '00' ) +  ':' +
    Totext ( Seconds , '00' )
    This is a seperate question below but related as well to this report.
    Another question I have is how can I round up for example 03:30:58 to 03:31:00
    And also how can I round down for example 03:26:10 to 03:26:00
    Any help would be appreciated.
    Thank you,
    Joe

    Hi Jamie,
    Well I ran into an issue with this. My Daily Total, there is no issue, it is displaying the proper time. But when I add a summary to my Group Footer 1, it doesn't add up properly.
    If I select only 1, 2, or 3 days my Date Range Total is adding fine but when selecting 5 days for example, as you can see from the picture below, for an unknowned reason the total of hrs is wrong.
    Do you know why this is happening.
    Than you for your help.
    Joe
    Picture below, this is working fine?

  • How to reduce the elapsed time on this query.

    Oracle10.2.0.5 on AIX6.1.
    Here is the awrsql report of a query for a one hour window.
    Here UNBILLED has 120million records which is partitioned and subpartitioned. It has 10 partitions and 312 subpartitions. One subpartition has 10M records, 10 others have 1M each and 270 subpartitions have 360K records each. And 31 subpartitions are empty.
    And BILLED has 300K records.
    Looking at report you can see that out of 984 seconds, 958 is used for IO. Machine is PowerPC_POWER5 with 8CPU and disk storage on EMC.
    Stat Name                                Statement   Per Execution % Snap
    Elapsed Time (ms)                           984,327        5,561.2    28.6
    CPU Time (ms)                                40,760          230.3    29.8
    Executions                                      177            N/A     N/A
    Buffer Gets                               1,923,456       10,867.0    46.9
    Disk Reads                                  203,832        1,151.6    25.1
    Parse Calls                                       0            0.0     0.0
    Rows                                        106,200          600.0     N/A
    User I/O Wait Time (ms)                     958,766            N/A     N/A
    Cluster Wait Time (ms)                            0            N/A     N/A
    Application Wait Time (ms)                        0            N/A     N/A
    Concurrency Wait Time (ms)                        0            N/A     N/A
    Invalidations                                     0            N/A     N/A
    Version Count                                     1            N/A     N/A
    Sharable Mem(KB)                                 31            N/A     N/A
    SQL_ID akg45a750sh0u
    DELETE UNBILLED WHERE (MSG_ID, MSG_ID2,SPLIT_ROW_NUM) IN (SELECT MSG_ID,MSG_ID2, SPLIT_ROW_NUM FROM BILLED
    WHERE BILL_REF_NO = :B2 AND BILL_REF_RESETS = :B1 )
    Plan hash value: 3879210699
    | Id  | Operation                            | Name                          | Rows  | Bytes | Cost (%CPU)| Pstart| Pstop |
    |   0 | DELETE STATEMENT                     |                               |       |       |     1 (100)|       |       |
    |   1 |  DELETE                              | UNBILLED                      |       |       |            |       |       |
    |   2 |   NESTED LOOPS                       |                               |     1 |   112 |     0   (0)|       |       |
    |   3 |    TABLE ACCESS BY GLOBAL INDEX ROWID| BILLED                        |     1 |    65 |     0   (0)|     1 |     1 |
    |   4 |     INDEX RANGE SCAN                 | BILLED_XCB_BILL_REF_TRANS     |     1 |       |     0   (0)|       |       |
    |   5 |    INDEX UNIQUE SCAN                 | UNBILLED_PK                   |     1 |    47 |     0   (0)|       |       |
    ----------------------------------------------------------------------------------------------------------------------Is there way to improve the elapsed time( currently 5,561.2 msec per execution) of the query?
    Thanks for your time...

    user1014212 wrote:
    You're giving very interresting pointers.. Especially the one using the GTT table... Thanks...
    I was also looking from a DBA point of view, say increasing the DB_CACHE_SIZE from 5GB to 8GB as the machine has almost 32GB memory out of which 13GB is free memory. Because the timed event is "db file sequential read" which takes 95% of Total Call time.
    select * from V_$SGA_TARGET_ADVICE;
    post SQL & FORMATTED results using tags                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

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  • How to reduce the fetch time of this sql?

    Here is the SQL, three-table join and joining conditions are:
    ms_ets_cntrl.ims_cntrt_oid=ims_alctn.ims_alctn_oid
    ims_alctn.ims_trde_oid=ims_trde.ims_trde_oid
    SELECT 'MCH' Type, ims_ets_cntrl.STTS tp_stts, count(*) Count  FROM ims_ets_cntrl  where ims_ets_cntrl.ims_cntrt_oid in
    (select ims_alctn.ims_alctn_oid  FROM ims_alctn, ( select ims_trde.ims_trde_oid from ims_trde
    where ( IMS_TRDE.IMS_TRDE_RCPT_DTTM  >= TO_DATE('10/29/2009 00:00', 'MM/DD/YYYY HH24:MI') AND IMS_TRDE.IMS_TRDE_RCPT_DTTM <= (TO_DATE('11/5/2009 23:59', 'MM/DD/YYYY HH24:MI')) )
    AND (IMS_TRDE.GRS_TRX_TYPE IN ('INJECTION','WITHDRAWAL','PAYMENT') OR IMS_TRDE.SSC_INVST_TYPE = 'FC' AND  1=1  and IMS_TRDE.SERVICE_TYPE='FS' )) TRDE
    where IMS_ALCTN.IMS_TRDE_OID=TRDE.IMS_TRDE_OID) and ims_ets_cntrl.outbnd_dest = 'ETD' group by ims_ets_cntrl.STTSOptimizer and related parameter info:
    SQL> show parameter optimizer
    NAME                                 TYPE        VALUE
    optimizer_dynamic_sampling           integer     1
    optimizer_features_enable            string      9.2.0
    optimizer_index_caching              integer     0
    optimizer_index_cost_adj             integer     100
    optimizer_max_permutations           integer     2000
    optimizer_mode                       string      CHOOSE
    SQL>select pname, pval1, pval2 from sys.aux_stats$ where sname='SYSSTATS_INFO';
    DSTART          11-16-2009 10:23
    DSTOP          11-16-2009 10:23
    FLAGS     1     
    STATUS          NOWORKLOADHere is autotrace output:
    Execution Plan
       0      SELECT STATEMENT Optimizer=CHOOSE
       1    0   SORT (GROUP BY)
       2    1     VIEW
       3    2       SORT (UNIQUE)
       4    3         TABLE ACCESS (BY INDEX ROWID) OF 'IMS_ETS_CNTRL'
       5    4           NESTED LOOPS
       6    5             NESTED LOOPS
       7    6               TABLE ACCESS (BY INDEX ROWID) OF 'IMS_TRDE'
       8    7                 INDEX (RANGE SCAN) OF 'IMS_TRDE_INDX4' (NON- UNIQUE)
       9    6               TABLE ACCESS (BY INDEX ROWID) OF 'IMS_ALCTN'
      10    9                 INDEX (RANGE SCAN) OF 'IMS_ALCTN_INDX1' (NON  -UNIQUE)
      11    5             INDEX (RANGE SCAN) OF 'IMS_ETS_CNTRL_INDX1' (NON  -UNIQUE)
    Statistics
              0  recursive calls
              0  db block gets
         244608  consistent gets
          58856  physical reads
              0  redo size
            497  bytes sent via SQL*Net to client
            499  bytes received via SQL*Net from client
              2  SQL*Net roundtrips to/from client
              2  sorts (memory)
              0  sorts (disk)
              1  rows processedHere is TKPROF output:
    call     count       cpu    elapsed       disk      query    current        rows
    Parse        1      0.00       0.00          0          0          0           0
    Execute      1      0.00       0.00          0          0          0           0
    Fetch        2      4.85     129.72      53863     244608          0           1
    total        4      4.85     129.72      53863     244608          0           1
    Misses in library cache during parse: 1
    Optimizer goal: CHOOSE
    Parsing user id: 63 
    Rows     Row Source Operation
          1  SORT GROUP BY
      12972   VIEW 
      12972    SORT UNIQUE
      12972     TABLE ACCESS BY INDEX ROWID IMS_ETS_CNTRL
      46236      NESTED LOOPS 
      19134       NESTED LOOPS 
      19744        TABLE ACCESS BY INDEX ROWID IMS_TRDE
    176922         INDEX RANGE SCAN IMS_TRDE_INDX4 (object id 34099)
      19134        TABLE ACCESS BY INDEX ROWID IMS_ALCTN
      19134         INDEX RANGE SCAN IMS_ALCTN_INDX1 (object id 34094)
      27101       INDEX RANGE SCAN IMS_ETS_CNTRL_INDX1 (object id 34101)
    ********************************************************************************Explain plan output:
    PLAN_TABLE_OUTPUT
    | Id  | Operation                         |  Name                | Rows  | Bytes | Cost  |
    |   0 | SELECT STATEMENT                  |                      |       |       |       |
    |   1 |  SORT GROUP BY                    |                      |       |       |       |
    |   2 |   VIEW                            |                      |       |       |       |
    |   3 |    SORT UNIQUE                    |                      |       |       |       |
    |*  4 |     TABLE ACCESS BY INDEX ROWID   | IMS_ETS_CNTRL        |       |       |       |
    |   5 |      NESTED LOOPS                 |                      |       |       |       |
    |   6 |       NESTED LOOPS                |                      |       |       |       |
    |*  7 |        TABLE ACCESS BY INDEX ROWID| IMS_TRDE             |       |       |       |
    |*  8 |         INDEX RANGE SCAN          | IMS_TRDE_INDX4       |       |       |       |
    |   9 |        TABLE ACCESS BY INDEX ROWID| IMS_ALCTN            |       |       |       |
    |* 10 |         INDEX RANGE SCAN          | IMS_ALCTN_INDX1      |       |       |       |
    |* 11 |       INDEX RANGE SCAN            | IMS_ETS_CNTRL_INDX1  |       |       |       |
    Predicate Information (identified by operation id):
       4 - filter("IMS_ETS_CNTRL"."OUTBND_DEST"='ETD')
       7 - filter("IMS_TRDE"."GRS_TRX_TYPE"='INJECTION' OR "IMS_TRDE"."GRS_TRX_TYPE"='WITHD
                  RAWAL' OR "IMS_TRDE"."GRS_TRX_TYPE"='PAYMENT' OR "IMS_TRDE"."SSC_INVST_TY
                  PE"='FC' AND "IMS_TRDE"."SERVICE_TYPE"='FS')
       8 - access("IMS_TRDE"."IMS_TRDE_RCPT_DTTM">=TO_DATE('2009-10-29 00:00:00', 'yyyy-mm-
                  dd hh24:mi:ss') AND "IMS_TRDE"."IMS_TRDE_RCPT_DTTM"<=TO_DATE('2009-11-05
                  23:59:00', 'yyyy-mm-dd hh24:mi:ss')
      10 - access("IMS_ALCTN"."IMS_TRDE_OID"="IMS_TRDE"."IMS_TRDE_OID")
      11 - access("IMS_ETS_CNTRL"."IMS_CNTRT_OID"="IMS_ALCTN"."IMS_ALCTN_OID")
    Note: rule based optimizationCould you please help tune this sql?
    How can I reduce the elapsed time? How can I reduce query read?
    If there is any other info that you need, please let me know!
    thank you very much!

    What exactly is this logic meant to do?
    AND    (ims_trde.grs_trx_type IN ('INJECTION', 'WITHDRAWAL', 'PAYMENT')
            OR ims_trde.ssc_invst_type = 'FC'
            AND ims_trde.service_type = 'FS')is that really:
    AND    (ims_trde.grs_trx_type IN ('INJECTION', 'WITHDRAWAL', 'PAYMENT')
            OR ims_trde.ssc_invst_type = 'FC')
    AND    ims_trde.service_type = 'FS'or is it maybe:
    AND   (ims_trde.grs_trx_type IN ('INJECTION', 'WITHDRAWAL', 'PAYMENT')
           OR (ims_trde.ssc_invst_type = 'FC'
               AND ims_trde.service_type = 'FS'))?

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    In the datawarehousing environment with very heavy reporting and ETL running at the same time, when Consistent Gets statistic is 5 times higher than Physical Reads, is that a reason for concern?

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    The parallel query LIO/PIO effect is easy to demonstrate by querying a chunk of data twice with a noparallel hint and twice with a parallel hint, and having autotrace turned on. you'll see the PIO's drop down on the second execution of the noparallel query, but on the parallel query they'll remain pretty much the same on the second execution.

  • Elapsed time beginner

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    Regards , 

    apok wrote:
    pjr1121 wrote:
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  • Reduce Logical IO [db block gets/consistent gets]

    Hi,
    Still I'm unsure about the Logical IO (db block gets + consistent gets).
    I want to reduce 'consistent gets' for this query
    SQL> set autotrace traceonly
    SQL> select * from cm_per_phone_vw;
    905 rows selected.
    Execution Plan
    Plan hash value: 524433310
    | Id  | Operation                    | Name         | Rows  | Bytes | Cost (%CPU)| Time     |
    |   0 | SELECT STATEMENT             |              |   868 | 38192 |     8   (0)| 00:00:01 |
    |   1 |  SORT GROUP BY NOSORT        |              |   868 | 38192 |     8   (0)| 00:00:01 |
    |   2 |   TABLE ACCESS BY INDEX ROWID| CI_PER_PHONE |  1238 | 54472 |     8   (0)| 00:00:01 |
    |   3 |    INDEX FULL SCAN           | CM172C0      |  1238 |       |     1   (0)| 00:00:01 |
    Statistics
              8  recursive calls
              0  db block gets
            922  consistent gets
              4  physical reads
              0  redo size
          39151  bytes sent via SQL*Net to client
           1045  bytes received via SQL*Net from client
             62  SQL*Net roundtrips to/from client
              0  sorts (memory)
              0  sorts (disk)
            905  rows processedFollowing is the view it's accessing
    CREATE OR REPLACE VIEW CM_PER_PHONE_VW
    AS
    SELECT
      per_id
      , MAX(DECODE(TRIM(phone_type_cd), 'MOB', phone)) AS MOB
      , MAX(DECODE(TRIM(phone_type_cd), 'HOME', phone)) AS HOME
      , MAX(DECODE(TRIM(phone_type_cd), 'BUSN', TRIM(phone) || ' ' || TRIM(extension))) AS BUSN
      , MAX(DECODE(TRIM(phone_type_cd), 'FAX', phone)) AS FAX
      , MAX(DECODE(TRIM(phone_type_cd), 'INT', phone)) AS INT
    FROM
      ci_per_phone
    GROUP BY
      per_idI have following indexes on table ci_per_phone
    INDEX_NAME                     COLUMN_NAME                    COLUMN_POSITION
    XM172P0                        PER_ID                                       1
    XM172P0                        SEQ_NUM                                      2
    XM172S1                        PHONE                                        1
    CM172C0                        PER_ID                                       1I tried creating indexes on PER_ID and PHONE_TYPE_CD but the consistent gets reduces to 920 instead of 922.
    Just for curiosity, how can I reduce this?
    secondly, is there any explanation on 'OPERATION' break of the plan, e.g. TABLE ACCESS BY INDEX ROWID ?
    Please advice.
    Luckys.

    Further I'm having problem with another query which is a view
    CREATE OR REPLACE VIEW CM_PER_CHAR_VW
    AS
    SELECT
    /*+ full (a) */
      a.acct_id
      , MAX(DECODE(a.char_type_cd, 'ACCTYPE', a.char_val)) acct_type
      , MAX(DECODE(a.char_type_cd, 'PRVBLCYC', a.adhoc_char_val)) prev_bill_cyc
    FROM
      ci_acct_char a
    WHERE
      a.effdt =
        (SELECT
          MAX(a1.effdt)
        FROM
          ci_acct_char a1
        WHERE a1.acct_id = a.acct_id
        AND a1.char_type_cd = a.char_type_cd)
    GROUP BY
      a.acct_idI'm not able to reduce the consistent gets and even the filter appears.
    I've analyzed the table as well as the index on the table.
    cisadm@CCBDEV> select * from cm_acct_char_vw;
    2649 rows selected.
    Execution Plan
    Plan hash value: 132362271
    | Id  | Operation              | Name         | Rows  | Bytes | Cost (%CPU)| Time     |
    |   0 | SELECT STATEMENT       |              |    27 |  4536 |    14   (8)| 00:00:01 |
    |   1 |  HASH GROUP BY         |              |    27 |  4536 |    14   (8)| 00:00:01 |
    |   2 |   VIEW                 |              |    27 |  4536 |    14   (8)| 00:00:01 |
    |*  3 |    FILTER              |              |       |       |            |          |
    |   4 |     HASH GROUP BY      |              |    27 |  2916 |    14   (8)| 00:00:01 |
    |   5 |      NESTED LOOPS      |              |  2686 |   283K|    13   (0)| 00:00:01 |
    |   6 |       TABLE ACCESS FULL| CI_ACCT_CHAR |  2686 |   157K|    12   (0)| 00:00:01 |
    |*  7 |       INDEX RANGE SCAN | XM064P0      |     1 |    48 |     1   (0)| 00:00:01 |
    Predicate Information (identified by operation id):
       3 - filter("A"."EFFDT"=MAX("A1"."EFFDT"))
       7 - access("A1"."ACCT_ID"="A"."ACCT_ID" AND
                  "A1"."CHAR_TYPE_CD"="A"."CHAR_TYPE_CD")
    Statistics
              0  recursive calls
              0  db block gets
           2754  consistent gets
              0  physical reads
              0  redo size
          76517  bytes sent via SQL*Net to client
           2321  bytes received via SQL*Net from client
            178  SQL*Net roundtrips to/from client
              0  sorts (memory)
              0  sorts (disk)
           2649  rows processedhere's the tkprof
    select *
    from
    cm_acct_char_vw
    call     count       cpu    elapsed       disk      query    current        rows
    Parse        2      0.00       0.00          0          0          0           0
    Execute      1      0.00       0.00          0          0          0           0
    Fetch      178      0.07       0.05          0       2754          0        2649
    total      181      0.07       0.05          0       2754          0        2649
    Misses in library cache during parse: 1
    Optimizer mode: CHOOSE
    Parsing user id: 63  (CISADM)
    Rows     Execution Plan
          0  SELECT STATEMENT   MODE: CHOOSE
          0   HASH (GROUP BY)
          0    VIEW
          0     FILTER
          0      HASH (GROUP BY)
          0       NESTED LOOPS
          0        TABLE ACCESS   MODE: ANALYZED (FULL) OF 'CI_ACCT_CHAR'
                       (TABLE)
          0        INDEX   MODE: ANALYZED (RANGE SCAN) OF 'XM064P0'
                       (INDEX (UNIQUE))
    Elapsed times include waiting on following events:
      Event waited on                             Times   Max. Wait  Total Waited
      ----------------------------------------   Waited  ----------  ------------
      SQL*Net message to client                     179        0.00          0.00
      SQL*Net message from client                   179        0.00          0.08
    ********************************************************************************I've an similar query for another table, where there are 1110 rows, but in the explain, no filter appears in the predicate
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