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

SGA/PGA question

Harvinder Singh



We have installed on sun solaris 10 having 2GB RAM and 2GB swap
file. In our system 4-5 application starts at same time and each
requires about 180 connections to the database. So about 900~ processes
can be connected at the same time and we have set the following
Processes = 1000
Pga_target = 200MB

We are using the dedicated server model and getting following error
frequently and also notice that physical RAM drops to 0 MB free:
Ora-12500 (unable to start the dedicated process)

Since this is just a development box, so to fix this issue we are
planning to move to MTS model.

Is there any other way to solve this issue, if we have to go to the MTS
model what should be the value of PGA and SGA to be set?