Yes, and that's exactly what I was suspecting. Thanks for the quick confirmation.
-rje KG> I guess you are looking in 'itc' in block dumps which shows the KG> ITL Count. KG> And yes.. There is an upper bound for number of ITLs based on the KG> block size. The transaction slots (and other headers) can not use KG> the more than 50% of the space available for data in the data KG> block. Each ITL will take 24 bytes of space in variable header KG> part of the data block. KG> In 2K block (2048) 50 % is 1024 Bytes. In this we can not use the KG> first 48 bytes (fixed headers in cache layer and TX data layers KG> uses them. So the space available for ITLs will be 976 bytes. KG> So you can get round (976/24) ~41 ITL slots for 2K block size. If KG> you set INITRANS more than 41 they are simply ignored and only 41 KG> ITLS are created in that block. RE> I'm still messing with my enqueue waits on an insert. I'm now able to RE> recreate it on a test database by throwing enough simultaneous inserts RE> at my table. I was going to make sure which of the tables/indexes was RE> actually causing the waits by individually raising the INITRANS above RE> what they would naturally expand to, and see how the waiting sessions RE> responded. RE> I was hitting it with 50 simultaneous inserts and usually had 10 RE> sessions go into an enqueue wait until the 40 sessions committed or RE> rolled back. So I was going though the indexes and then tables RE> raising the INITRANS to 50 to see which one(s) made a difference. RE> None of them made a difference. RE> So I dumped blocks that had been populated only during this exercise. RE> Invariably, there were 0x29 Itl slots. Is there something out there RE> that would limit the Itl entries to 41 even when MAXTRANS=255? Is RE> there some secret bound based on block size? Ours is 2k (which I RE> figure is part of the problem). RE> Other vital stats: 8.0.5 on Solaris 2.7. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Robert Eskridge INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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).
