April 2012 archive

Apr 30

Error 404 Not Found with EM 12c

I have recently installed Oracle’s Enterprise Manager 12c for a new environment. Everything was working just fine when I left work last week but when I tried to connect to EM today, I got the following: Error 404–Not Found From RFC 2068 Hypertext Transfer Protocol — HTTP/1.1: 10.4.5 404 Not Found Huh?!?!? What do you …

Continue reading »

Apr 30

_gc_fusion_compression

I found this very cool blog post which discusses how Oracle decides how much of a datablock to transmit across a RAC cluster interconnect: http://orainternals.wordpress.com/2012/04/29/_gc_fusion_compression/

Apr 26

Blackouts with EMCLI

In my previous post, I talked about how to set a Enterprise Manager blackout with the Agent’s emctl utility on the command line. Everything was working fine until I tried to set a blackout with a clustered database. When trying to set a blackout on a clustered database target you will get an error similar …

Continue reading »

Apr 26

Blackouts with EMCTL

I have a need to take down a database to perform a cold snapshot of the database’s files. This database is monitored by Enterprise Manager and I do not want to receive an alert when the database is down. So I need to figure out how to start a blackout in Enterprise Manager from the …

Continue reading »

Apr 24

Installing Agent11g on Windows

Normally, to install the 11g version of the Oracle agent for Grid Control, one would push the agent from Grid Control the database server. However, when pushing from Grid Control to a Windows server, we receive an error telling us that Windows does not have SSH running on port 22. Windows servers normally do not …

Continue reading »

Apr 23

Patch Policy

About a year and a half ago, I moved to a new company and started working as their DBA. The company did not previously apply any patches to any Oracle databases. Since I have been here, I have seen IT system security become more of a focus point and undergo a higher level of scrutiny …

Continue reading »

Apr 02

One Exabyte Per Day

I ran across this article which discusses the Square Kilometer Array (SKA). As a DBA, the thing that struck me was that this system will generate 1 exabyte of data per day that will have to be stored somewhere. That is challenge #1, getting the data into a data store of some type in a …

Continue reading »