RE: Adding rowids to fragmented table

A "little" bit off the topic - but I recently dropped a column from a large table (107 million records). I don't do this very often, and forgot to run a sequential scan on the table after the in-place alter, so the users got stuck with the table rebuilding itself everytime they selected rows from it! Won't forget it again next time :-) I have a feeling adding the rowid's in your mail below, will have the same impact on the system ... -----Original Message----- From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On Behalf Of Sebastian, Norma J. Sent: Tuesday, November 02, 2004 7:23 PM To: informix-list@iiug.org Subject: Adding rowids to fragmented table Hi, When adding rowids to a frag'd table, should I drop all the indices first before altering the table? (the rebuild indices afterwards) If I drop the indices before alter table, am I just making work for myself?... Does adding rowid change the indices in any way (I could just re-stat the table)? It will take 1-2 hours to recreate the indices. Table is 40 GB, (4 frags, round robin). 4 indices taking about 6 GB (total, not each). I'll test multiple ways if project gives me the time. Would appreciate input on best practice for adding rowids... (best would be not to add them, but SAP needs them for the upgrade). I checked sys admin and perf guides... Either I didn't check the right places, or there's not that much there about this... Thanks, Norma Jean ----------------------------------------- ============================================================ The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any reproduction, dissemination or distribution of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Tellabs ============================================================ sending to informix-list sending to informix-list