All Oracle Error Codes
Oracle DBA Forum

Frequent Oracle Errors

TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
invalid identifier
PL/SQL compilation error
internal error
missing expression
table or view does not exist
end-of-file on communication channel
TNS:listener unknown in connect descriptor
insufficient privileges
PL/SQL: numeric or value error string
TNS:protocol adapter error
ORACLE not available
target host or object does not exist
invalid number
unable to allocate string bytes of shared memory
resource busy and acquire with NOWAIT specified
error occurred at recursive SQL level string
ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
unable to extend temp segment by string in tablespace
Credential retrieval failed
missing or invalid option
invalid username/password; logon denied
unable to create INITIAL extent for segment
out of process memory when trying to allocate string bytes
shared memory realm does not exist
cannot insert NULL
TNS:unable to connect to destination
remote database not found ora-02019
exception encountered: core dump
inconsistent datatypes
no data found
TNS:operation timed out
PL/SQL: could not find program
existing state of packages has been discarded
maximum number of processes exceeded
error signaled in parallel query server
ORACLE instance terminated. Disconnection forced
TNS:packet writer failure
see ORA-12699
missing right parenthesis
name is already used by an existing object
cannot identify/lock data file
invalid file operation
quoted string not properly terminated

RE: SGA Free memory



I am at 9204 and I was experiencing ora-4031. That's why I started watching
the free memory.

thank you

Gene Gurevich

        "Hameed, Amir"                                
        x.com>                                   To
        02/08/2006 11:38       >, <oracle-l@(protected)>      
        AM                                      cc
                         RE: SGA Free memory          

This is normal behavior as chunks are flushed from and added to the
shared pool, the memory fluctuates. As long as you are not seeing
ORA-04031 error or contention on the shared pool latch is not too high,
you are fine. What RDBMS version are you on?

-----Original Message-----
From: oracle-l-bounce@(protected)
Sent: Wednesday, February 08, 2006 12:28 PM
To: oracle-l@(protected)
Subject: Re: SGA Free memory

Hi all:

I am watching the usage of the SGA on my database via the following

select to_char(sysdate,'mm-dd-yyyy hh24:mi:ss'), name, bytes/(1024*1024)
from v$sgastat, dual
where pool like '%shared%' and name = 'free memory' order by bytes asc

I am running it every 10 seconds. Recently I saw the free memory going
25M to 145M over the course
of 10 sec. I'm wondering what could have caused it. Would appreciate any

thank you

Gene Gurevich
Oracle Engineering