What file to log/trace to look for?

If the database is not accessible to the TNSPING, SQLPlus or any application. What is the log file to search for messages in error reported in Oracle?
What should be the starting point to solve problems?
Oracle 10g R2.
Thank you
Smith

user517525 wrote:
Thank you. My connections are currently. I was trying to learn the means of troubleshooting.

Ah, referring to your original post, good starting point would be always search for the error message. It's really sense of wanting to give any type of troubleshooting, if we don't know yet what is the error.

However, I will give you some principles for connectivity issues.

(1) straight right which is a client process and a process Server . Any program that you use to connect to the database (sqlplus, iSqlPlus Toad, local SQL, Excel (via odbc), some app developer) is the client to the database. It does not matter if that deal happens to run on the same square as the database, it's always a client process.

(2) according to the application and its architecture, the client process may be on your desk, on the database server, or some other box (intermediate level). Yet once the database really cares.

(3) customers and only customers, use tnsnames.ora to solve a connection string to a host address, port, and the name of the service. (There are other methods besides tnsnames, but they aren't nearly as often).

(4) the auditor is a process from the side Server . As such, he doesn't know or care about any file tnsnames.ora.

(5) If you define a database connection, the database where the link is defined becomes a client to the database that is the target of the link. Yet once, continue straight in your mind who is the client and server.

Once again, all true troubleshooting begins with an error message. Look it up. Understand that. Believe it. The database doesn't lie not.

Tags: Database

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