Trying to lose a datafile.
Chen Shapira wrote me a suggestion regarding losing a data file.“Try moving a data file while the DB is up and running, and try to make Oracle "notice"that it is gone. On Linux, Oracle does not notice...
View ArticleWhen all else fails, follow instructions.
Today I tried to open my test database and got:ORA-16038: log 3 sequence# 729 cannot be archivedORA-19809: limit exceeded for recovery filesORA-00312: online log 3 thread 1:...
View ArticleExposed Password in Data Pump
I was just looking at a production Data Pump today with a text exposed 'system/password'. I was startled. Then I remembered that in the last shop Data Pumps involved Temporarly change the system user...
View ArticleSemafore? Cannot mount in Exclusive.
As Chen says, the challenges always come after 5PM.I had a Daylight Savings Patch to apply to 2 databases. I think that someone else, was blogging about installing this just recently. The patch is...
View ArticleMoving back to a lost spfile
We had an unexpected outage last saturday morning, and the person who restarted the database inadvertantly did so with an old pfile instead of the spfile - which was lost (not because of the restart)....
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Northern California Oracle Users' Group Conference
If you are in Northern California you may be interested in the Spring Conference of the Northern California Oracle Users' Group. Among the speakers is Rich Niemiec. Here is the info, also available at...
View ArticleLessons Learned after a Hell Weekend
A necessary part of any database project plan is a fall back plan. What is planned if there is a failure at any particular step.Backup - this includes enough space allocated for additional backups as...
View ArticleQ.E.D.
User on test DB, "Response time is terrible."DBA, "You are the only user on the DB, but you have a dozen sessions open. Can you close some sessions?"User, "I can't see my sessions through the...
View ArticleI'm beginning to distrust Oracle
I am learning that I have been trusting Oracle too much. I have figured that Oracle has top rate developers, so when they offer a facility like ASMM or GATHER_STATS_JOB. I assume that it will be done...
View ArticleSomething is VERY busy
I have been suspecting that something is causing excess connects/disconnects from our database. To see the number of connects I went in search of the listener.log. By default it is in...
View ArticleMake it go away! (rman delete)
So much documentation tells you how to set up things for Oracle. It is harder to find information on how to get rid of it once you have it.I am doing perfectly lovely incremental compressed backupsets...
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NoCOUG conference 8/21/08
For those in the San Francisco Bay Area. The NoCoug Congerence is tomorrow Thursday 8/21. Cary Millsap is the keynote speaker. All are invited. Summer Conference 2008Hosted by ChevronAugust 21, 2008at...
View Articletravelling trace file
I just noticed a detail that I don't like. We had an error logged in the alert log. It informed me that details were in db_ckpt_1234.log. Fine, but there was no such log in the bdump directory.The dba...
View ArticleOOW - Day 1 - Blogger's perks.
OOW'08 - Day 1. I spent the day in the 11g New Features Exam Cram. A couple of people encouraged me to try the exam. I have never touched 11g. I took the course as an intro to 11g, not as a refresher...
View ArticleOOW - Day 2 - Simple things
I spent most of the day in hands on classes. I learned to use the Configuration Management Pack of Grid Control to install patches. It looked really interesting. Now I have to go back to work and...
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A lazy log writer
I've been laughing because I live 1 block from Moscone Center. It was closer for me to walk between the conference and my house than it was to walk between some of the sessions. Today, I saw the other...
View ArticleLazy Log Writer - The non Resolution
OK, after the huge emergency, "You can't attend the last day of open world because our problems are too big." After my debugging efforts, how did the problem of the slow writes to the redo log files...
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Delete vs. Truncate - graphically
This is too funny to not share. Of course, everyone knows that a truncate is much more efficient than a full table delete. On my system, still suffering from a slow log writer, but absolutely quiet at...
View ArticleLazy Log Writer - Vindication & thank you Fitaloon
The final chapter: The database continued plodding along wretchedly until last Friday night at midnight when I got a call, "The production database is down."I crawled out of bed, bleary eyed, signed...
View ArticleMaking problems for myself
Playing around with my toy database I asked myself, "What happens if DUAL has more than 1 row?" I found out.SQL>insert into dual values ('Y');1 row created.SQL>select * from dual;D-XSQL>select...
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