Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Could I ask you please if is possible in your tests to incrase to 10M, te= st=20 and share if this improves in some way your performance. =0D Thank you in advance=0D =0D -------Original Message-------=0D =0D From: oracle-l@xxxxxxxxxxxxx=0D Date: 07/26/04 15:35:43=0D To: oracle-l@xxxxxxxxxxxxx=0D Subject: Re: "free buffer waits" under eXtreme Transaction Loads=0D =0D =46rom the 1st email:=0D =0D Cache Sizes (end)=0D ~~~~~~~~~~~~~~~~~=0D Buffer Cache: 768M Std Block Size: 8K=0D Shared Pool Size: 160M Log Buffer: 1,024K=0D =0D --------------------=0D Hi, only for curiosity=0D which is your LOG_BUFFER size?=0D =0D -------Original Message-------=0D =0D From: oracle-l@xxxxxxxxxxxxx=0D Date: 07/26/04 13:29:47=0D To: oracle-l@xxxxxxxxxxxxx; oracledba@xxxxxxxxxxx=0D Subject: "free buffer waits" under eXtreme Transaction Loads=0D =0D Folks=0D =0D How are "free buffer waits" (below) to be addressed?=0D =0D Case - Benchmark of OLTP Transactions(ATM Trans) of a Banking=0D Application=0D =0D Machine - HP Superdome=0D Storage XP1024=0D DB Server =3D3D 32 CPUs (Itanium)=0D CPU Utilization =3D3D 30 % approx=0D =0D For log file sync wait (below) we are considering assigning 4=0D controllers exclusively to the 4 logfiles(raw)=0D =0D Will provide any data needed=0D =0D Thanks=0D =0D =0D @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@=0D STATSPACK report for=0D =0D DB Name DB Id Instance Inst Num Release Cluster Host=0D ------------ ----------- ------------ -------- ----------- -------=0D ------------=0D BMON 19538057 bmon 1 9.2.0.5.0 NO sut92=0D =0D Snap Id Snap Time Sessions Curs/Sess Comment=0D ------- ------------------ -------- ---------=0D -------------------=0D Begin Snap: 666 26-Jul-04 00:42:11 82 16.1=0D End Snap: 667 26-Jul-04 00:53:04 84 35.4=0D Elapsed: 10.88 (mins)=0D =0D Cache Sizes (end)=0D ~~~~~~~~~~~~~~~~~=0D Buffer Cache: 768M Std Block Size: 8K=0D Shared Pool Size: 160M Log Buffer: 1,024K=0D =0D Load Profile=0D ~~~~~~~~~~~~ Per Second Per Transaction=0D --------------- ---------------=0D Redo size: 6,159,634.77 5,678.93=0D Logical reads: 101,769.87 93.83=0D Block changes: 26,383.87 24.32=0D Physical reads: 11.62 0.01=0D Physical writes: 392.43 0.36=0D User calls: 33,233.83 30.64=0D Parses: 3,261.30 3.01=0D Hard parses: 0.00 0.00=0D Sorts: 0.29 0.00=0D Logons: 0.00 0.00=0D Executes: 30,980.41 28.56=0D Transactions: 1,084.65=0D =0D % Blocks changed per Read: 25.93 Recursive Call %: 6.54=0D Rollback per transaction %: 0.00 Rows per Sort: 126.76=0D =0D Instance Efficiency Percentages (Target 100%)=0D ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=0D Buffer Nowait %: 99.98 Redo NoWait %: 100.00=0D Buffer Hit %: 99.99 In-memory Sort %: 100.00=0D Library Hit %: 100.02 Soft Parse %: 100.00=0D Execute to Parse %: 89.47 Latch Hit %: 98.18=0D Parse CPU to Parse Elapsd %: 83.70 % Non-Parse CPU: 98.47=0D =0D Shared Pool Statistics Begin End=0D ------ ------=0D Memory Usage %: 42.95 43.16=0D % SQL with executions>1: 80.91 84.42=0D % Memory for SQL w/exec>1: 81.85 86.25=0D =0D Top 5 Timed Events=0D ~~~~~~~~~~~~~~~~~~ %=0D Total=0D Event Waits Time (s)=0D Ela Time=0D -------------------------------------------- ------------ -----------=0D --------=0D log file sync 710,816 2,601=0D 24.30=0D CPU time 2,569=0D 24.00=0D free buffer waits 3,743 2,525=0D 23.58=0D latch free 90,584 1,056=0D 9.86=0D write complete waits 981 749=0D 7.00=0D -------------------------------------------------------------=0D =0D =0D =0D CPU Elapsd=0D Buffer Gets Executions Gets per Exec %Total Time (s) Time (s)=0D Hash Value=0D --------------- ------------ -------------- ------ -------- ---------=0D ---------- 9,022,249 2,182,384 4.1 13.6 272.41=0D 527.78 931376387=0D Module: lisrvr@sut93 (TNS V1-V3)=0D select entity_cre_flg, del_flg, sol_id, acct_prefix, acct_num, b=0D acid, foracid, acct_name, acct_short_name, cust_id, emp_id, gl_s=0D ub_head_code, acct_ownership, schm_code, TO_CHAR(dr_bal_lim), ac=0D ct_rpt_code, frez_code, frez_reason_code, TO_CHAR(acct_opn_date,=0D 'DD-MM-YYYY HH24:MI:SS'), acct_cls_flg, TO_CHAR(acct_cls_date,'D=0D =0D 7,753,648 708,188 10.9 11.7 199.02 1427.49=0D 327885819=0D Module: lisrvr@sut93 (TNS V1-V3)=0D insert into TBA_DAILY_TRAN_DETAIL_TBL (tran_date,tran_id,part_tr=0D an_srl_num,del_flg,tran_type,tran_sub_type,part_tran_type,gl_sub=0D _head_code,acid,value_date,tran_amt,tran_particular,entry_user_i=0D d,pstd_user_id,vfd_user_id,entry_date,pstd_date,vfd_date,rpt_cod=0D e,ref_num,instrmnt_type,instrmnt_date,instrmnt_num,instrmnt_alph=0D =0D ----------------------------------------------------------------=0D Please see the official ORACLE-L FAQ: http://www.orafaq.com=0D ----------------------------------------------------------------=0D To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx=0D put 'unsubscribe' in the subject line.=0D --=0D Archives are at 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