Raj, How can we know if only one Pvt Interconnect is used at a given time? How are you monitoring them real-time? Is the GC traffic not load balanced ? Are you using cluster_interconnects?
Thanks, Ravi. > ----- Original Message ----- > From: Jamadagni, Rajendra > To: Multiple recipients of list ORACLE-L > Sent: Thursday, September 25, 2003 6:19 PM > Subject: RE: Oracle Compress Option > > > we have 2 gbit private interconnects of which only > one is used at any given time. Everyone else talks > to the dbs using public network. Both are > active/active. On one instance luckily we have > application partitioning one side manages the feeds > that come from every foot/bast/basketball, hockey > and scores of other games and processes them and > sends it out to customers. Another side takes this > data plus people sitting to make corrections if any > before it is fed to video generators and goes on > espn network broadcast. So it works fine. > > Other instances are legacy ... the active/active > is more like a HA configuration, lots of people > connected on either side all the time lots of DML > activity going around all the time. We see more of a > GC traffic ... but we are experimenting with > _fairness_threshold parameter to see if that will > help. As for performance issues, we encounter lots > of BBW but unfortunately that is due to business > logic and can't be easily changed. > > Otherwise we do fine. > Raj > > -------------------------------------------------------------------------------- > > Rajendra dot Jamadagni at nospamespn dot com > All Views expressed in this email are strictly > personal. > QOTD: Any clod can have facts, having an opinion > is an art ! > -----Original Message----- > From: Tanel Poder > [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 25, 2003 10:35 AM > To: Multiple recipients of list ORACLE-L > Subject: Re: Oracle Compress Option > > > Hm, interesting... > > How does your active-active config work, do you > have write activity on all nodes? > I'd be interested in any performance issues you > had or currently have... > Have you partitioned your application or data > usage somehow? > What kind of interconnect you're using? > > Tanel. > ----- Original Message ----- > From: Jamadagni, Rajendra > To: Multiple recipients of list ORACLE-L > Sent: Thursday, September 25, 2003 4:49 PM > Subject: RE: Oracle Compress Option > > > Waleed, I get your point ... > > We have 6 RAC instances that run active-active > ... and compared to availability requirements, we > (incl management) decided that disk is cheap. > > I guess it is relative ... > > Raj > > -------------------------------------------------------------------------------- > > Rajendra dot Jamadagni at nospamespn dot com > All Views expressed in this email are strictly > personal. > QOTD: Any clod can have facts, having an > opinion is an art ! > -----Original Message----- > From: Khedr, Waleed > [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 25, 2003 9:35 AM > To: Multiple recipients of list ORACLE-L > Subject: RE: Oracle Compress Option > > > Disk is not cheap if you pay for high > availability configuration. I compress historical > data on daily basis and was able to save 70 percent > of the disk space. Imagine the amount of savings for > five TB. > > Two major issues: > > 1) Oracle says updates will be slow on > compressed tables, but I say don't even try to > update a compressed table, uncompress first > otherwise you will end up with a segment that is not > good at all for scattered reads. > > 2) You can not add columns to the table when > it's compressed, so if you compressed a big table > and need a new column you need to recreate the table > without compression. So adding many extra columns > before compression is a good idea. > > It's mainly good for data warehouses > applications. > > Regards, > > Waleed > > -----Original Message----- > From: Jamadagni, Rajendra > [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 25, 2003 9:05 AM > To: Multiple recipients of list ORACLE-L > Subject: RE: Oracle Compress Option > > > I think 9202 doesn't like to export > compressed tables in direct mode ... so watch out > for that ... I implemented, tested and next day > reverted back to regular tables due to this export > issue. Disk is cheap. > > A BAARF party member wannabe !! > Raj > > -------------------------------------------------------------------------------- > > Rajendra dot Jamadagni at nospamespn dot > com > All Views expressed in this email are > strictly personal. > QOTD: Any clod can have facts, having an > opinion is an art ! > > > > -----Original Message----- > From: Mogens Nørgaard > [mailto:[EMAIL PROTECTED] > Sent: Wednesday, September 24, 2003 10:05 > PM > To: Multiple recipients of list ORACLE-L > Subject: Re: Oracle Compress Option > > > > "Compress to impress?" by Julian Dyke is a > good presentation on this > topic (see for instance > http://www.ukoug.org/calendar/jan03/jan30ab.htm). > > I do have the article - 202 K with no > compression, 147 K with > compression :). > > Let me know if you're interested, and I'll > email it directly to you. > > Mogens > > [EMAIL PROTECTED] wrote: > > >Does anybody has any experience with > Oracle 9I compression option. I did some test on > 9202 with a table of more 14 million rows. Table has > total 7 indexes. Surprising both table and indexes > are using more space after compression. Before > compression space used is 13064MB and after > compression 13184MB. In both the cases I did export > from source table and stored in two different > tablespaces. Any insight on that and any > disadvantages of using that. > > > > >Thanks > __________________________________ Do you Yahoo!? The New Yahoo! 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