Snapshot log and unused space

I have a snapshot log that is big in size, yet empty. How can i shrink the shapshot log smaller ? Looking for the comparable command for a snapshot that we use for a table - by truncating the table. How do we do it in the snapshot/materialized view world ? I don't want to drop and recreate the snapshot log either.......at least not, if i can help it.
Using Oracle 9.2 here on unix platform.

Question: Do you understand why the table, without an index, has 32KB assigned and 4KB used?
Answer: ASE will allocate an extent (8x 4KB pages = 32KB) when the table is created, and then assign (ie, 'use') one of those pages for immediate use by the table
Question: What happens when an index is created?
Answer: ASE will also allocate an extent (8x 4KB pages = 32KB) when the index is created, and then assign (ie, 'use') one of those pages for immediate use by the index
If you run 'sp_spaceused tmp,1' you'll get a detailed breakdown of allocated/used/unused space for each index.
NOTE: If you're running ASE 15.7 ESD#2 (or higher), the 'create table' command has a 'deferred_allocation' option that delays the allocation of an extent (for the table and each index) until the first row is inserted.

Similar Messages

  • Import error with snapshot logs

    I have an export that is a full from our production database. I'm trying to import a small subset of tables from a user to a different user. One of the tables has a snapshot log against it I believe due to the error msg in the import file. I don't care about the snapshot log I just want to get the table imported. How can I tell import to avoid the snapshot log. If this is not possible, how do I figure out what table it's says can't be found to import into.
    IMP log:
    . importing TYUADM's objects into DWADM
    . . importing table "ZONE" 10583 rows imported
    IMP-00017: following statement failed with ORACLE error 942:
    "BEGIN SYS.DBMS_REPUTIL.SYNC_UP_REP('TYUADM','ZONE'); END;"
    IMP-00003: ORACLE error 942 encountered
    ORA-00942: table or view does not exist
    ORA-06512: at "SYS.DBMS_INTERNAL_TRIGGER", line 79
    ORA-06512: at "SYS.DBMS_INTERNAL_TRIGGER", line 157
    ORA-06512: at "SYS.DBMS_INTERNAL_TRIGGER", line 201
    ORA-06512: at "SYS.DBMS_REPUTIL", line 616
    ORA-06512: at line 1
    "BEGIN SYS.DBMS_SNAPSHOT_UTL.SYNC_UP_LOG('TYUADM','ZONE'); END;"
    IMP-00003: ORACLE error 1435 encountered
    ORA-01435: user does not exist
    ORA-06512: at "SYS.DBMS_ISNAPSHOT", line 108
    ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1666
    ORA-06512: at line 1
    IMP-00000: Import terminated unsuccessfully

    Oracle Server - Enterprise Edition - Version: 8.1.7.0 to 11.2.0.2 - Release: 8.1.7 to 11.2
    Oracle Server - Personal Edition - Version: 8.1.7.0 to 11.2.0.2 [Release: 8.1.7 to 11.2]
    Oracle Server - Standard Edition - Version: 8.1.7.0 to 11.2.0.2 [Release: 8.1.7 to 11.2]
    Information in this document applies to any platform.
    Symptoms
    You have created a snapshot log:
    SQL> connect system/manager
    SQL> grant create snapshot to scott;
    SQL> connect scott/tiger
    SQL> create snapshot my_snap as select * from emp;
    SQL> create snapshot log on scott.emp;
    You run a user level export:
    % exp system/manager file=exp_s.dmp log=exp_s.log owner=scott
    Export: Release 9.2.0.6.0 - Production on Tue Dec 28 08:06:12 2004
    Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
    Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
    Export terminated successfully without warnings.
    You run a user level import, e.g. in a different database:
    SQL> connect system/manager
    SQL> create user hugo identified by hugo default tablespace
    users temporary tablespace temp
    quota unlimited on users;
    SQL> grant create session, create table, create snapshot
    to hugo;
    % imp system/manager file=exp_s.dmp log=imp_s.log fromuser=scott touser=hugo
    Import: Release 9.2.0.6.0 - Production on Tue Dec 28 08:08:16 2004
    Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
    Connected to: Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
    . importing SCOTT's objects into HUGO
    . . importing table "BONUS" 0 rows imported
    . . importing table "DEPT" 4 rows imported
    . . importing table "EMP" 14 rows imported
    . . importing table "MLOG$_EMP" 0 rows imported
    . . importing table "MY_SNAP" 14 rows imported
    . . importing table "SALGRADE" 5 rows imported
    IMP-00017: following statement failed with ORACLE error 942:
    "BEGIN SYS.DBMS_SNAPSHOT_UTL.SYNC_UP_LOG('SCOTT','EMP'); END;"
    IMP-00003: ORACLE error 942 encountered
    ORA-00942: table or view does not exist
    ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1589
    ORA-06512: at line 1
    Note that the line number in the first ORA-6512 error my differ between versions:
    - in 8.1.7.4.0: ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1033
    - in 9.2.0.6.0: ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1589
    - in 10.1.0.3.0: ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1599
    - in 10.2.0.4.0: ORA-06512: at "SYS.DBMS_SNAPSHOT_UTL", line 1666
    Also note that the same errors occur when the export was done with a table level export.
    If the user SCOTT (FROMUSER) does not exist in the target database, import aborts with:
    "CREATE SNAPSHOT LOG ON "SCOTT"."EMP" WITH PRIMARY KEY EXCLUDING NEW VALUES"
    "USING ("MLOG$_EMP", (...left_out...))"
    IMP-00003: ORACLE error 1435 encountered
    ORA-01435: user does not exist
    IMP-00000: Import terminated unsuccessfully
    Changes
    The information in this article applies to:
    - Oracle Server - Enterprise Edition - Version: 8.1.7.0 to 11.2.0.x
    - Oracle Server - Personal Edition - Version: 8.1.7.0 to 11.2.0.x
    - Oracle Server - Standard Edition - Version: 8.1.7.0 to 11.2.0.x
    This problem can occur on any platform.
    Cause
    Snapshots, snapshot logs, and related items are exported with the schema name explicitly given in the DDL statements, therefore, snapshots and their related items cannot be imported into a different schema.
    If you attempt to use FROMUSER and TOUSER to import snapshot data, an error will be written to the Import log file and the items will not be imported.
    Solution
    It is expected behavior that the snapshot log cannot be imported with a FROMUSER and TOUSER import. Therefore the errors should either be prevented from happening, or be ignored:
    1. Either delete the snapshot logs before the export takes place. Then run the export and import. After import completes, re-create the snapshot logs manually, and if necessary, perform a refresh of the snapshot.
    2. Or ensure that the FROMUSER (SCOTT in this example) exists in the target database, so the import session does not abort with the IMP-0 error (Import terminated unsuccessfully). During the import, ignore the errors that are related to the snapshot logs. After import completes, re-create the snapshot logs manually, and if necessary, perform a refresh of the snapshot.

  • Queries about snapshots and snapshot logs in Oracle Ebusiness Suite

    Hi ,
    We are running Oracle E-business Suite 11.5.8, and have noticed some on-demand snapshots with associated snapshot logs.
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    What we need to know is why are they growing. As they are on-demand snapshots, something need to refresh them manually, but we do not know what.
    Can we purge these logs and reclaim the space, or is there a process involved that we are not doing?
    The snapshot details are as follows:
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    Sanpshot table: INV.MTL_SYSTEM_ITEMS_B
    Snapshot: INV.MTL_SYS_ITEMS_SN
    Snapshot log: INV.MLOG$_MTL_DEMAND
    Sanpshot table: INV.MTL_DEMAND
    Snapshot: INV.MTL_DEMAND_SN
    Snapshot log: INV.MLOG$_MTL_SUPPLY
    Sanpshot table: INV.MTL_SUPPLY
    Snapshot: INV.MTL_SUPPLY_SN
    Regards.

    HI,
    Please go through below MOS docs:-
    When do Snapshot Logs get Purged [ID 35217.1]
    SNAPSHOT LOGS GROWS DUE TO MISSING/INVALID SNAPSHOT [ID 1031924.6]
    How To Improve the Performance of the Refresh Collection Snapshots When Running Very High Volumes [ID 550005.1]
    MLOG$_ENI_OLTP_ITEM_STAR is Growing too Large, can it be Truncated? [ID 367693.1]
    Materialized View Refresh : Log Population and Purge [ID 236233.1]
    Refresh Collection Snapshots Performance - Managing MLOG$ Tables and Snapshots for Data Collections [ID 1063953.1]
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    JD

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    When you use log and capture, the disk system is being asked by FCP to essentially "keep capturing until we tell you to stop ... and no, we don't know HOW much that will be either." It is stressful on the system to be continually wandering around looking for space to stuff those ones and zeros with out any sense of how many they have to accommodate. One solution available to the system is to allocate the ENTIRE empty space on the disk as the potential capture file. This essentially locks the machine as there is no headroom for basic disk operations.
    However if you set a limit on capture now, say 60 minutes, the disk system can allocate the space and may seem to be less confused by the process. It still does not know EXACTLY how much you want, but it knows you will not want MORE THAN the limit and therefor can reduce some of the uncertainty.
    Better yet is to record to a timecode addressable tape. This allows you to log the tape, then use batch capture. When you do this, the system knows EXACTLY how much space to allocate for each file and is very efficient.
    Good luck.
    x

  • NET8의 LOGGING AND TRACE관련 PARAMETER에 대한 Q & A

    제품 : SQL*NET
    작성날짜 : 1999-07-30
    NET8의 LOGGING AND TRACE관련 PARAMETER에 대한 Q & A
    ==================================================
    PURPOSE
    NET8의 LOGGING AND TRACE관련 PARAMETER에 대해 알아 보도록한다
    Explanation
    1. NET8에서 trace를 왜 사용하고 어떤 component들에 trace를 할 수 있나요 ?
    Trace의 특징은 네트워크을 수행하게 될때 network event들을 기술한다
    즉 trace와 관련된 일련의 문장들이 자세하게 생성된다.
    "Tracing"의 운영으로 log파일에 제공되어 있는 것 보다 NET8의 component들의
    내부적인 정보를 보다 많이 얻을 수 있다.
    이러한 정보는 에러의 결과로 인하여 발생하는 동일한 event들로 파일들에
    결과가 생성되어 이를 이용하여 문제의 원인을 판단할 수 있다.
    주의 : trace의 기능을 이용하는 경우 충분한 disk space와 system
    performance의 현격한 저하를 가져올 수 있다.
    즉 trace의 기능은 반드시 필요할 경우에만 사용할 것을 권한다.
    Example
    Reference Ducumment
    << trace의 기능을 이용하여 trace를 할수 있는 component들 >>
    * Network listener
    * Net8 components on the client and server
    * Connection Manager
    * Oracle Names Server
    * Oracle Names Control Utility
    * TNSPING utility
    2. 어떤 parameter들을 설정하면 trace 기능을 이용할 수 있는가 ?
    tracing을 하기 위해서는 특정 trace parameter들을 설정함으로써 가능하며
    아래에 주어진 방법들과 또는 utility들중 하나를 선택하여 설정함으로써
    사용할 수 있다.
    * Component Configuration Files
    * Component Control Utilities
    * Oracle Trace
    component의 configuration 파일을 이용하여 traceing parameter를 설정하려면
    1) component의 configuration 파일에 다음의 traceing parameter를 설정한다.
    - SQLNET.ORA for client or server, LISTENER.ORA for listener:
    TRACE_LEVEL_<CLIENT/LISTENER/SERVER>=(0/4/10/16)
    TRACE_DIRECTORY_<CLIENT/LISTENER/SERVER>=<directory name>
    LOG_DIRECTORY_<CLIENT/LISTENER/SERVER>=<directory name>
    2) 만일 component들이 수행중인 동안 configuration 파일의 수정이 있었다면
    변경된 parameter들을 사용하기 위해 component들을 다시 시작하여야 한다.
    component control utility들을 이용하여 trace parameter들을 설정하려면
    1) listener의 경우, Listener Control Utility(lsnrctl)에서 TRACE 명령어를
    이용하여 listener가 수행중인 동안에도 trace level을 설정할 수 있다.
    EX)
    RC80:/mnt3/rctest80> lsnrctl
    LSNRCTL for SVR4: Version 8.0.4.0.0 - Production on 01-SEP-98 15:16:52
    (c) Copyright 1997 Oracle Corporation. All rights reserved.
    Welcome to LSNRCTL, type "help" for information.
    LSNRCTL> trace admin
    Connecting to (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
    Opened trace file: /mnt4/coe/app/oracle/product/8.0.4/network/trace/
    lsnr_coe.trc
    The command completed successfully
    LSNRCTL> trace off
    Connecting to (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
    The command completed successfully
    LSNRCTL> exit
    RC80:/mnt3/rctest80>
    2) Oracle Names의 경우, Names Control Utility(namesctl)에서 TRACE_LEVEL
    명령어를 이용하여 Oracle Names가 수행중인 동안에도 trace level을
    설정할 수 있다.
    주의 : Connection Manager의 경우, trace level은 configuration 파일인
    CMAN.ORA 에서만 설정할 수 있다.
    Oracle Enterprose manager(이하 OEM)에 있는 Oracle Trace는 trace parameter
    들을 설정하고 GUI를 통해 trace data의 형태를 볼수 있도록 하는 tracing tool
    이다.
    3. Trace된 data를 해석할 수 있는 다른 utility들이 있다면 ?
    Trace Assistant를 사용하면 사용자의 *.trc 파일 (SQL*Net v2의 형식에 의해
    생성된) 또는 *.txt (Orace Trace 과 TRCFMT에 의해 생성된 출력물)을 통해
    trac된 정보를 해석할 수 있다.
    이 유틸리티 네트워크의 문제들로 인해 발생하는 문제점들을 진단하고
    해결하는 데 보다 많은 정보를 제공하여 사용자의 이해를 돕는다.
    * the source and destination of trace files
    * the flow of packets between network nodes
    * which component of Net8 is failing
    * pertinent error codes
    다음에 주어진 명령어를 수행하므로써 Trace Assistant 실행할 수 있다.
    trcasst [options] <filename>
    Trace Assistant Text Formatting Options
    -o Displays connectivity and Two Task Common (TTC) information.
    After the -o the following options may be used:
    c (for summary connectivity information)
    d (for detailed connectivity information)
    u (for summary TTC information)
    t (for detailed TTC information)
    q (displays SQL commands enhancing summary TTC
    information)
    -p Oracle Internal Use Only
    -s Displays statistical information
    -e Enables display of error information After the -e, zero
    or one error decoding level may follow:
    0 or nothing (translates the NS error numbers dumped
    from the nserror function plus lists all
    other errors)
    1 (displays only the NS error translation from
    the nserror function)
    2 (displays error numbers without translation)
    만일 option들이 제공되지 않는다면 기본적으로 -odt -e -s가 지정되어 자세한
    connectivity, Two-Task Common, 에러 level 0 그리고 통계정보들이 tracing
    된다.
    4. SQL*Net v2 tracing과 어떻게 다른가 ?
    Net8 tracing에서는 이전 버전인 SQL*NET V2에서 제공 되는 모든 option을
    포함하고 있고 Oracle Trace의 기능이 추가되었다.
    이것은 Oracle Trace Repository를 OEM 콘솔을 통하여 사용자의 trace 정보를
    관리할 수 있도록 허용한다.
    5. *.cdf와 *.dat은 어떤 파일 인가 ?
    *.cdf 와 *.dat 파일들은 Oracle Trace에 의해 생성되는 파일들로서 이 파일들을
    읽기 위해서는 반드시 trcfmt utility를 이용해야만 한다.
    trcfmt는 binary (*.dat와 *.cdf의 확장자) 파일내에 있는 data를 일반text
    (.txt의 확장자)로 정보를 추출한다. 이 tool을 사용하기 위해서는 다음의
    명령어를 이용하면 된다.
    $ trcfmt collection.cdf
    주의 : .cdf와 .dat파일이 존재하는 디렉토리가 아닌 곳에서 이 tool을 이용
    한다면 path가 포함되야 한다. 만일 하나의 .cdf 와 .dat 파일들내에
    여러 프로세스들의 traceing정보가 수집된다면 그것들은 process_id.txt
    의 이름과 함께 파일이 추출될 것이다.
    6. trac관련 configuration은 어떤 것이 있으며 설정할 수 있는 parameter는
    무엇이 있는가 ?
    ==========================================================================
    || SQLNET.ORA Parameters ||
    ==========================================================================
    DAEMON.TRACE_DIRECTORY
    Purpose: Controls the destination directory of the Oracle
    Enterprise Manager daemon trace file
    Default Value: $ORACLE_HOME/network/trace
    Description
    Available Oracle Enterprise Manager Installation Guide
    Example: DAEMON.TRACE_DIRECTORY=/oracle/traces
    DAEMON.TRACE_LEVEL
    Purpose: Turns tracing on/off to a certain specified level for
    the Oracle Enterprise Manager daemon.
    Default Value: 0 or OFF
    * 0 or OFF - No trace output
    * 4 or USER - User trace information
    Available Values
    * 10 or ADMIN - Administration trace information
    * 16 or SUPPORT - WorldWide Customer Support trace
    information
    Description
    Available Oracle Enterprise Manager Installation Guide
    Example: DAEMON.TRACE_LEVEL=10
    DAEMON.TRACE_MASK
    Purpose: Specifies that only the Oracle Enterprise Manager daemon
    trace entries are logged into the trace file.
    Default Value: $ORACLE_HOME/network/trace
    Description
    Available Oracle Enterprise Manager Installation Guide
    Example: DAEMON.TRACE_MASK=(106)
    LOG_DIRECTORY_CLIENT
    Purpose: Controls the directory for where the log file is written
    Default Value: Current directory where executable is started from.
    Example: LOG_DIRECTORY_CLIENT=/oracle/network/trace
    LOG_DIRECTORY_SERVER
    Purpose: Controls the directory for where the log file is written
    Default Value: Current directory where executable is started from.
    Valid in File: SQLNET.ORA
    Example: LOG_DIRECTORY_SERVER=/oracle/network/trace
    LOG_FILE_CLIENT
    Purpose: Controls the log output filename for an Oracle client.
    Default Value: SQLNET.LOG
    Example: LOG_FILE_CLIENT=client
    LOG_FILE_SERVER
    Purpose: Controls the log output filename for an Oracle server.
    Default Value: SQLNET.LOG
    Example: LOG_FILE_SERVER=svr
    NAMESCTL.TRACE_LEVEL
    Purpose: Indicates the level at which the NAMESCTL program should
    be traced.
    Default Value: OFF
    Values: OFF, USER, or ADMIN
    Example: NAMESCTL.TRACE_LEVEL=ADMIN
    NAMESCTL.TRACE_FILE
    Purpose: Indicates the file in which the NAMESCTL trace output is
    placed.
    Default Value: namesctl_PID.cdf and namesctl_PID.dat
    Example: NAMESCTL.TRACE_FILE=NMSCTL
    NAMESCTL.TRACE_DIRECTORY
    Purpose: Indicates the directory where trace output from the NAMESCTL
    utility is placed.
    Default
    Value: $ORACLE_HOME/network/trace
    Example: NAMESCTL.TRACE_DIRECTORY=/ORACLE/TRACE
    NAMESCTL.TRACE_UNIQUE
    Indicates whether a process identifier is appended to the
    Purpose: name of each trace file generated, so that several can
    coexist.
    Default
    Value: OFF
    Values: OFF or ON
    Example: NAMESCTL.TRACE_UNIQUE = ON
    TNSPING.TRACE_DIRECTORY
    Purpose: Control the destination directory of the trace file
    Default Value: $ORACLE_HOME/network/trace
    Example: TNSPING.TRACE_DIRECTORY=/oracle/traces
    TNSPING.TRACE_LEVEL
    Purpose: Turns tracing on/off to a certain specified level
    Default Value: 0 or OFF
    * 0 or OFF - No trace output
    * 4 or USER - User trace information
    Available Values
    * 10 or ADMIN - Administration trace information
    * 16 or SUPPORT - WorldWide Customer Support trace
    information
    Example: TNSPING.TRACE_LEVEL=10
    TRACE_DIRECTORY_CLIENT
    Purpose: Control the destination directory of the trace file
    Default Value: $ORACLE_HOME/network/trace
    Example: TRACE_DIRECTORY_CLIENT=/oracle/traces
    TRACE_DIRECTORY_SERVER
    Purpose: Control the destination directory of the trace file
    Default Value: $ORACLE_HOME/network/trace
    Example: TRACE_DIRECTORY_SERVER=/oracle/traces
    TRACE_FILE_CLIENT
    Purpose: Controls the name of the client trace file
    Default Value: SQLNET.CDF and SQLNET.DAT
    Example: TRACE_FILE_CLIENT=cli
    TRACE_FILE_SERVER
    Purpose: Controls the name of the server trace file
    Default Value: SVR_PID.CDF and SVR_PID.DAT
    Example: TRACE_FILE_SERVER=svr
    TRACE_LEVEL_CLIENT
    Purpose: Turns tracing on/off to a certain specified level
    Default Value: 0 or OFF
    * 0 or OFF - No trace output
    * 4 or USER - User trace information
    Available Values
    * 10 or ADMIN - Administration trace information
    * 16 or SUPPORT - WorldWide Customer Support trace
    information
    Example: TRACE_LEVEL_CLIENT=10
    TRACE_LEVEL_SERVER
    Purpose: Turns tracing on/off to a certain specified level
    Default Value: 0 or OFF
    * 0 or OFF - No trace output
    * 4 or USER - User trace information
    Available Values
    * 10 or ADMIN - Administration trace information
    * 16 or SUPPORT - WorldWide Customer Support trace
    information
    Example: TRACE_LEVEL_SERVER=10
    TRACE_UNIQUE_CLIENT
    Used to make each client trace file have a unique name to
    Purpose: prevent each trace file from being overwritten with the next
    occurrence of the client. The PID is attached to the end of
    the filename.
    Default
    Value: OFF
    Example: TRACE_UNIQUE_CLIENT=ON
    USE_CMAN
    If the session is in an Enhanced Discovery Network with a
    Purpose: Names Server, this parameter forces all sessions to go
    through a Connection Manager to get to the server.
    Default
    Value: FALSE
    Values: TRUE or FALSE
    Example: USE_CMAN=TRUE
    ==========================================================================
    || LISTENER.ORA Parameters ||
    ==========================================================================
    LOG_DIRECTORY_listener_name
    Purpose: Controls the directory for where the log file is written
    Default Value: Current directory where executable is started from.
    Example: LOG_DIRECTORY_LISTENER=/oracle/traces
    LOG_FILE_listener_name
    Purpose: Specifies the filename where the log information is
    written
    Default Value: listener_name.log
    Example: LOG_FILE_LISTENER=lsnr
    TRACE_DIRECTORY_listener_name
    Purpose: Control the destination directory of the trace file
    Default Value: $ORACLE_HOME/network/trace
    Example: TRACE_DIRECTORY_LISTENER=/oracle/traces
    TRACE_FILE_listener_name
    Purpose: Controls the name of the listener trace file
    Default Value: LISTENER_NAME.CDF and LISTENER_NAME.DAT
    Example: TRACE_FILE_LISTENER=lsnr
    TRACE_LEVEL_listener_name
    Purpose: Turns tracing on/off to a certain specified level
    Default Value: 0 or OFF
    * 0 or OFF - No trace output
    * 4 or USER - User trace information
    Available Values
    * 10 or ADMIN - Administration trace information
    * 16 - WorldWide Customer Support trace information
    Example: TRACE_LEVEL_LISTENER=10
    ==========================================================================
    || NAMES.ORA Parameters ||
    ==========================================================================
    NAMES.TRACE_DIRECTORY
    Purpose: Indicates the name of the directory to which trace files
    from a Names Server trace session are written.
    Default
    Value: platform specific
    Example: names.trace_directory = complete_directory_name
    NAMES.TRACE_FILE
    Purpose: Indicates the name of the output file from a Names Server
    trace session. The filename extension is always.trc
    Default
    Value: names
    Example: names.trace_file = filename
    NAMES.TRACE_LEVEL
    Purpose: Indicates the level at which the Names Server is to be
    traced.
    Default Value: OFF
    Example: names.trace_level = OFF
    NAMES.TRACE_UNIQUE
    indicates whether each trace file has a unique name, allowing
    Purpose: multiple trace files to coexist. If the value is set to ON, a
    process identifier is appended to the name of each trace file
    generated.
    Default
    Value: OFF
    Example: names.trace_unique = ON
    names.trace_file = names_05.trc
    ==========================================================================
    CMAN.ORA Parameters
    ==========================================================================
    TRACING
    Default
    Value: NO
    Example: TRACING = NO
    References
    7. listener.log 파일에 loggin정보를 남기지 않게 하는 방법이 있나요 ?
    고객이 개발하여 사용중인 application에서 NET8을 이용하여 접속하거나 접속을
    종료하는 경우 listener.log에 이와 관련된 정보가 남으며, 수 많은 사용자가
    접속을 하게 되므로서 급속하게 listener.log 파일이 커져 $ORACLE_HOME이 있는
    file system이 꽉 차서 데이터베이스가 hang이 되는 결과를 초래하는 경우가 있다.
    고객들은 listener.log에 write할수 있는 메세지의 양에 제한을 두기를 원하는
    경우가 있으나 이러한 기능은 제공되지 않는다. 하지만 listener의 logging은
    ON 또는 OFF는 설정을 통해서 가능하다.
    Net8에서는 listener.ora에 "LOGGING_(the listener name)=off"를 설정하게
    되면 listener의 logging을 멈출 수 있다.
    물론 설정후 listener stop후 재기동을 하셔야 변경된 paramerter에 의해
    이 기능이 enable됩니다.
    참고 : SQL*NET 2.3.x 에서도 이 parameter가 유효한가요 ?
    물론 사용이 가능합니다. NET8에서 사용하는 것과 동일하게 parameter를
    listener.ora에 설정함으로서 가능합니다.
    EX)
    LOGGING_LISTENER=OFF
    이 parameter는 listener의 전체 logging을 disable하는 parameter로 일부만
    여과하여 logging할 수 있는 기능은 아니다.
    이 parameter는 NET8에 알려진 parameter로 SQL*NET 2.3.x manuals에 나와
    있지는 않지만 정상적으로 사용할 수 있다.

  • My mac froze in an application so I shut it down by powering off with button, now when I try to turn it on I have a grey screen with Apple loge and the timer swirling but it doesn't get past this, please help!

    I Shut down my Mac by holding in the power button after my iMac froze and now when I try to turn it back it on all I get is the grey screen with Apple loge and the timer and doesn't get any further.  I have tried the diagnostic test but nothing was found.

    Take each of these steps that you haven't already tried. Stop when the problem is resolved.
    To restart an unresponsive computer, press and hold the power button for a few seconds until the power shuts off, then release, wait a few more seconds, and press it again briefly.
    Step 1
    The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
    There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
    a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
    b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
    c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
    d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
    Step 2
    If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
    Step 3
    Sometimes a startup failure can be resolved by resetting the NVRAM.
    Step 4
    If a desktop Mac hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.
    Step 5
    If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
    Step 6
    Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
    Step 7
    If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
    Start up in safe mode. Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
    Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
    The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
    When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
    If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
    If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
    Step 8
    Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
    This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
    Step 9
    If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.  
    Step 10
    Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
    Step 11
    Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
    Step 12
    This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
    Step 13
    If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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