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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: A VLDB contest

Luca Canali


Hi Kevin,

From my largest DB:

POOL      NAME                   BYTES
------------ -------------------------- ----------
shared pool ASM extent pointer array   185352360

I imagine this memory is strictly related to X$KFFXP, correct me if I am


From the same DB:

SQL> select sum(TOTAL_MB) from v$asm_diskgroup_stat;


Does this mean that Oracle is using on average 9 bytes per extent ?

From: oracle-l-bounce@(protected)
Sent: Wednesday, August 30, 2006 1:39 AM
To: Bobak, Mark; ORACLE-L
Subject: RE: A VLDB contest

Right, the ASM instance gives the pointer array info to the
consumer instances where it is cached in the shared pool.

I've not seen one iota of discussion on this list about how
Oracle maps a data block to an extent within an ASM diskgroup.
Must not be an interesting topic?

It is indeed using these pointers. Such mapping is never free. Volume
managers have always had to do that--but have always stored
such mappings in kernel memory. No FUD intended here. I just
wanted to get people curious about the topic.


 From: Bobak, Mark [mailto:Mark.Bobak@(protected)]
 Sent: Tuesday, August 29, 2006 4:30 PM
 To: kevinc@(protected)
 Subject: RE: A VLDB contest
 I don't have an 'ASM extent pointer array' at all in my ASM
  1 select * from v$sgastat
  2 where name like '%ASM%'
  3* order by bytes
 SQL> /
 POOL      NAME                   BYTES
 ------------ -------------------------- ----------
 shared pool ASM rollback operations       2592
 shared pool ASM map operations          3360
 shared pool ASM db client             11840
 shared pool ASM buffer object          37288
 shared pool ASM file                75328
 In my database instance that relies on ASM, however.....
  1  select * from v$sgastat
  2  where name like '%ASM%'
  3* order by bytes
 SQL> /
 POOL      NAME                   BYTES
 ------------ -------------------------- ----------
 shared pool ASM rollback operations       2592
 shared pool ASM map operations         16856
 shared pool ASM file                19200
 large pool  ASM map operations hashta    393216
 shared pool ASM extent pointer array    9527624

 Mark J. Bobak
 Senior Oracle Architect
 ProQuest Information & Learning

 Ours is the age that is proud of machines that can think and
suspicious of men who try to. --H. Mumford Jones, 1892-1980



 From: oracle-l-bounce@(protected)
 Sent: Tuesday, August 29, 2006 7:24 PM
 Subject: A VLDB contest

 Does anyone actually have ASM "put to the test" as they say?
 have huge ASM extent pointer array areas within their shared
pool? Anyone
 have "ORA-4031-creeping syndrome" ?

 For instance:
       select * from v$sgastat;
 POOL      NAME                   BYTES
 ------------ -------------------------- ----------
  shared pool ASM extent pointer array 287097144

 Anyone see 1GB or more?

 Kevin Closson
 Chief Architect, Oracle Database Solutions
 PolyServe, Inc