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: ORA-04031: unable to allocate 4200 bytes of shared memory

A Joshi


If you have increased the size it is likely bacause of fragmentation. Pin pl/sql on database startup. and pin sql soon after startup. Get dev to use bind variables.
You could change the cursor_sharing parameter too but that is avoidable.
Avoid ad hoc sql queries to database.
"Smith, Ron L." <rlsmith@(protected):
I have a couple of unrelated Oracle 8.1.7 databases that occasionally
getting the following error:
ORA-04031: unable to allocate 4200 bytes of shared memory ("shared
pool","unknown object","sga heap","state objects")=20

Flushing the Shared Pool does not help the problem. The size of the
Shared Pool has been increased several times, but doesn't appear to
help. Neither database is very busy.

One of the databases serves as a "Gateway" database between a 7.3.4 and
a 9.2 database just for connectivity. The other is just a straight
8.1.7 OLTP database.

Bouncing the database ALWAYS corrects the problem for several weeks.

Can anyone help be diagnose the problem?


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