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Home -> Community -> Mailing Lists -> Oracle-L -> RE: INITTRANS parameter settings
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I think that even one session can use parallel DML and in this case increase for INITRANS and multiple freelists should help.
Alex Hillman
-----Original Message-----
From: Tom Pall [mailto:tom_at_cdproc.com]
Sent: Monday, November 06, 2000 11:46 AM
To: Multiple recipients of list ORACLE-L
Subject: Re: INITTRANS parameter settings
Initrans defines the inital number of 43 byte interested transaction list
(ITL)
entries originally allocated in the data block. Maxtrans defines the
maximum
number of ITLs a block can have.
ITLs are where each session doing DML on a block places its row locks. If one session at a time is doing DML, multiple ITLs won't speed things up. Once an ITL is created, its space cannot be reused for row data. Having initrans/maxtrans higher than needed for concurrency wastes block space.
> Our client has a table which will have over 200
> updates and 100 inserts every second. Should I leave
> the default setting for inittrans or should I increase
> the value of this parameter. Can someone shed some
> light on this issue.
>
> Thanks
> Sonia P.
>
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> INET: spajerowski_at_yahoo.com
>
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Tom Pall INET: tom_at_cdproc.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). ------_=_NextPart_001_01C0481C.88C46720 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; = charset=3Diso-8859-1"> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version = 5.5.2448.0"> <TITLE>RE: INITTRANS parameter settings</TITLE> </HEAD> <BODY> <P><FONT SIZE=3D2>I think that even one session can use parallel DML = and in this case increase for INITRANS and multiple freelists should = help.</FONT></P> <P><FONT SIZE=3D2>Alex Hillman</FONT> </P> <P><FONT SIZE=3D2>-----Original Message-----</FONT> <BR><FONT SIZE=3D2>From: Tom Pall [<A = HREF=3D"mailto:tom_at_cdproc.com">mailto:tom_at_cdproc.com</A>]</FONT> <BR><FONT SIZE=3D2>Sent: Monday, November 06, 2000 11:46 AM</FONT> <BR><FONT SIZE=3D2>To: Multiple recipients of list ORACLE-L</FONT> <BR><FONT SIZE=3D2>Subject: Re: INITTRANS parameter settings</FONT> </P> <BR> <P><FONT SIZE=3D2>Initrans defines the inital number of 43 byte = interested transaction list (ITL)</FONT> <BR><FONT SIZE=3D2>entries originally allocated in the data = block. Maxtrans defines the maximum</FONT> <BR><FONT SIZE=3D2>number of ITLs a block can have.</FONT> </P> <P><FONT SIZE=3D2>ITLs are where each session doing DML on a block = places its row locks.</FONT> <BR><FONT SIZE=3D2>If one session at a time is doing DML, multiple ITLs = won't speed things up.</FONT> <BR><FONT SIZE=3D2>Once an ITL is created, its space cannot be reused = for row data. </FONT> <BR><FONT SIZE=3D2>Having initrans/maxtrans higher than needed for = concurrency wastes block space.</FONT> </P> <BR> <P><FONT SIZE=3D2>----- Original Message ----- </FONT> <BR><FONT SIZE=3D2>To: Multiple recipients of list ORACLE-L = <ORACLE-L_at_fatcity.com></FONT> <BR><FONT SIZE=3D2>Sent: Monday, November 06, 2000 8:50 AM</FONT> </P> <BR> <P><FONT SIZE=3D2>> Our client has a table which will have over = 200</FONT> <BR><FONT SIZE=3D2>> updates and 100 inserts every second. Should I = leave</FONT> <BR><FONT SIZE=3D2>> the default setting for inittrans or should I = increase</FONT> <BR><FONT SIZE=3D2>> the value of this parameter. Can someone shed = some</FONT> <BR><FONT SIZE=3D2>> light on this issue.</FONT> <BR><FONT SIZE=3D2>> </FONT> <BR><FONT SIZE=3D2>> Thanks</FONT> <BR><FONT SIZE=3D2>> Sonia P.</FONT> <BR><FONT SIZE=3D2>> </FONT> <BR><FONT SIZE=3D2>> = __________________________________________________</FONT> <BR><FONT SIZE=3D2>> Do You Yahoo!?</FONT> <BR><FONT SIZE=3D2>> Thousands of Stores. Millions of = Products. All in one Place.</FONT> <BR><FONT SIZE=3D2>> <A HREF=3D"http://shopping.yahoo.com/" = TARGET=3D"_blank">http://shopping.yahoo.com/</A></FONT> <BR><FONT SIZE=3D2>> -- </FONT> <BR><FONT SIZE=3D2>> Please see the official ORACLE-L FAQ: <A = HREF=3D"http://www.orafaq.com" = TARGET=3D"_blank">http://www.orafaq.com</A></FONT> <BR><FONT SIZE=3D2>> -- </FONT> <BR><FONT SIZE=3D2>> Author: sonia pajerowski</FONT> <BR><FONT SIZE=3D2>> INET: spajerowski_at_yahoo.com</FONT> <BR><FONT SIZE=3D2>> </FONT> <BR><FONT SIZE=3D2>> Fat City Network Services -- = (858) 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT SIZE=3D2>> San Diego, = California -- Public Internet = access / Mailing Lists</FONT> <BR><FONT SIZE=3D2>> = --------------------------------------------------------------------</FO= NT> <BR><FONT SIZE=3D2>> To REMOVE yourself from this mailing list, send = an E-Mail message</FONT> <BR><FONT SIZE=3D2>> to: ListGuru_at_fatcity.com (note EXACT spelling = of 'ListGuru') and in</FONT> <BR><FONT SIZE=3D2>> the message BODY, include a line containing: = UNSUB ORACLE-L</FONT> <BR><FONT SIZE=3D2>> (or the name of mailing list you want to be = removed from). You may</FONT> <BR><FONT SIZE=3D2>> also send the HELP command for other = information (like subscribing).</FONT> </P> <P><FONT SIZE=3D2>-- </FONT> <BR><FONT SIZE=3D2>Please see the official ORACLE-L FAQ: <A = HREF=3D"http://www.orafaq.com" = TARGET=3D"_blank">http://www.orafaq.com</A></FONT> <BR><FONT SIZE=3D2>-- </FONT> <BR><FONT SIZE=3D2>Author: Tom Pall</FONT> <BR><FONT SIZE=3D2> INET: tom_at_cdproc.com</FONT> </P> <P><FONT SIZE=3D2>Fat City Network Services -- (858) = 538-5051 FAX: (858) 538-5051</FONT> <BR><FONT SIZE=3D2>San Diego, = California -- Public Internet = access / Mailing Lists</FONT> <BR><FONT = SIZE=3D2>---------------------------------------------------------------= -----</FONT> <BR><FONT SIZE=3D2>To REMOVE yourself from this mailing list, send an = E-Mail message</FONT> <BR><FONT SIZE=3D2>to: ListGuru_at_fatcity.com (note EXACT spelling of = 'ListGuru') and in</FONT> <BR><FONT SIZE=3D2>the message BODY, include a line containing: UNSUB = ORACLE-L</FONT> <BR><FONT SIZE=3D2>(or the name of mailing list you want to be removed =Received on Mon Nov 06 2000 - 12:08:15 CST
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