滿意答案

yaoyangm

2016.08.03

采納率：47%????等級：12

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當(dāng)然要對監(jiān)聽日志文件(listener.log)進(jìn)行定期清理，如果不定期清理，會(huì)遇到下面一些麻煩：

1：監(jiān)聽日志文件(listener.log)變得越來越大，占用額外的存儲空間。(當(dāng)然現(xiàn)在存儲白菜價(jià)，不差那幾G的空間。但是我們還是要本著工匠情懷，精益求精)

2：監(jiān)聽日志文件(listener.log)變得太大會(huì)帶來一些問題：LISTENER.LOG日志大小不能超過2GB，超過會(huì)導(dǎo)致LISTENER監(jiān)聽器無法處理新的連接。

3：監(jiān)聽日志文件(listener.log)變得太大，給寫入、查看帶來的一些性能問題、麻煩。

也有人說是監(jiān)聽服務(wù)進(jìn)程一般使用標(biāo)準(zhǔn)C函數(shù)Write寫出到Listener.log，listener.log文件時(shí)使用的是O_WRONLY|O_CREAT|O_APPEND，O_APPEND即追加到文件的尾端，一般來說追加寫方式不會(huì)因?yàn)槲募酱髮懙卦铰Ｆ查_這個(gè)不談，在一個(gè)很大的監(jiān)聽日志文件(listener.log)查找某一天或某一個(gè)錯(cuò)誤，這個(gè)確實(shí)會(huì)帶來一些性能問題。查找起來也相當(dāng)麻煩。

所以應(yīng)該定期對監(jiān)聽日志文件(listener.log)進(jìn)行清理，另外一種說法叫截?cái)嗳罩疚募ｊP(guān)于截?cái)啾O(jiān)聽日志，要注意一些問題。初學(xué)ORACLE的時(shí)候遇到一個(gè)錯(cuò)誤的截?cái)啾O(jiān)聽日志的，下面演示一下

[oracle@DB-Server log]$ mv listener.log listener.log.20150114

[oracle@DB-Server log]$ cp /dev/null listener.log

[oracle@DB-Server log]$ more listener.log

如上所示，這樣截?cái)啾O(jiān)聽日志(listener.log)后，監(jiān)聽服務(wù)進(jìn)程(tnslsnr)并不會(huì)將新的監(jiān)聽信息寫入listener.log，而是繼續(xù)寫入listener.log.20150114

[oracle@DB-Server log]$ tail listener.log.20150114

15-JAN-2015 22:40:01 * service_update * EPPS * 0

15-JAN-2015 22:47:59 * service_update * EPPS * 0

15-JAN-2015 22:58:00 * service_update * EPPS * 0

15-JAN-2015 23:08:00 * service_update * EPPS * 0

15-JAN-2015 23:18:01 * service_update * EPPS * 0

15-JAN-2015 23:28:01 * service_update * EPPS * 0

15-JAN-2015 23:38:02 * service_update * EPPS * 0

15-JAN-2015 23:41:02 * service_update * EPPS * 0

15-JAN-2015 23:50:26 * ping * 0

15-JAN-2015 23:51:03 * service_update * EPPS * 0

[oracle@DB-Server log]$ tail listener.log.20150114

15-JAN-2015 23:18:01 * service_update * EPPS * 0

15-JAN-2015 23:28:01 * service_update * EPPS * 0

15-JAN-2015 23:38:02 * service_update * EPPS * 0

15-JAN-2015 23:41:02 * service_update * EPPS * 0

15-JAN-2015 23:50:26 * ping * 0

15-JAN-2015 23:51:03 * service_update * EPPS * 0

15-JAN-2015 23:57:40 * ping * 0

15-JAN-2015 23:57:41 * ping * 0

15-JAN-2015 23:57:42 * ping * 0

15-JAN-2015 23:57:43 * ping * 0

[oracle@DB-Server log]$ more listener.log

[oracle@DB-Server log]$

規(guī)范正確的流程應(yīng)該這么處理：

Step 1：首先停止監(jiān)聽服務(wù)進(jìn)程(tnslsnr)記錄日志。

[oracle@DB-Server log]$ lsnrctl set log_status off;

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 16-JAN-2015 00:02:59

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.9.15)(PORT=1521)))

LISTENER parameter "log_status" set to OFF

The command completed successfully

Step 2：將監(jiān)聽日志文件(listener.log)復(fù)制一份，以listener.log.yyyymmdd格式命名

[oracle@DB-Server log]$ cp listener.log listener.log.20150114

Step 3：將監(jiān)聽日志文件(listener.log)清空。清空文件的方法有很多

3.1 echo “” > filename

3.2 cp /dev/null 或 echo /dev/null > filename

Step 4：開啟監(jiān)聽服務(wù)進(jìn)程(tnslsnr)記錄日志

[oracle@DB-Server log]$ lsnrctl set log_status on;

當(dāng)然也可以移走監(jiān)聽日志文件(listener.log)，數(shù)據(jù)庫實(shí)例會(huì)自動(dòng)創(chuàng)建一個(gè)listener.log文件。

% lsnrctl set log_status off

% mv listener.log listener.yyyymmdd

% lsnrctl set log_status on

當(dāng)然這些操作應(yīng)該通過shell腳本來處理，然后結(jié)合crontab作業(yè)定期清理、截?cái)啾O(jiān)聽日志文件。例如網(wǎng)上的一個(gè)清理、截?cái)啾O(jiān)聽日志文件的shell腳本。

rq=` date +"%d" `

cp $ORACLE_HOME/network/log/listener.log $ORACLE_BACKUP/network/log/listener_$rq.log

su - oracle -c "lsnrctl set log_status off"

cp /dev/null $ORACLE_HOME/network/log/listener.log

su - oracle -c "lsnrctl set log_status on"

這樣的腳本還沒有解決一個(gè)問題，就是截?cái)嗟谋O(jiān)聽日志文件保留多久的問題。比如我只想保留這些截?cái)嗟谋O(jiān)聽日志一個(gè)月時(shí)間，我希望作業(yè)自動(dòng)維護(hù)。不需要我去手工操作。有這樣一個(gè)腳本cls_oracle.sh可以完全做到這個(gè)，當(dāng)然它還會(huì)歸檔、清理其它日志文件，例如告警文件(alert_sid.log)等等。功能非常強(qiáng)大。

#!/bin/bash

#

# Script used to cleanup any Oracle environment.

#

# Cleans: audit_log_dest

# background_dump_dest

# core_dump_dest

# user_dump_dest

#

# Rotates: Alert Logs

# Listener Logs

#

# Scheduling: 00 00 * * * /home/oracle/_cron/cls_oracle/cls_oracle.sh -d 31 > /home/oracle/_cron/cls_oracle/cls_oracle.log 2>

&1

#

# Created By: Tommy Wang 2012-09-10

#

# History:

#

RM="rm -f"

RMDIR="rm -rf"

LS="ls -l"

MV="mv"

TOUCH="touch"

TESTTOUCH="echo touch"

TESTMV="echo mv"

TESTRM=$LS

TESTRMDIR=$LS

SUCCESS=0

FAILURE=1

TEST=0

HOSTNAME=`hostname`

ORAENV="oraenv"

TODAY=`date +%Y%m%d`

ORIGPATH=/usr/local/bin:$PATH

ORIGLD=$LD_LIBRARY_PATH

export PATH=$ORIGPATH

# Usage function.

f_usage(){

echo "Usage: `basename $0` -d DAYS [-a DAYS] [-b DAYS] [-c DAYS] [-n DAYS] [-r DAYS] [-u DAYS] [-t] [-h]"

echo " -d = Mandatory default number of days to keep log files that are not explicitly passed as parameters."

echo " -a = Optional number of days to keep audit logs."

echo " -b = Optional number of days to keep background dumps."

echo " -c = Optional number of days to keep core dumps."

echo " -n = Optional number of days to keep network log files."

echo " -r = Optional number of days to keep clusterware log files."

echo " -u = Optional number of days to keep user dumps."

echo " -h = Optional help mode."

echo " -t = Optional test mode. Does not delete any files."

}

if [ $# -lt 1 ]; then

f_usage

exit $FAILURE

fi

# Function used to check the validity of days.

f_checkdays(){

if [ $1 -lt 1 ]; then

echo "ERROR: Number of days is invalid."

exit $FAILURE

fi

if [ $? -ne 0 ]; then

echo "ERROR: Number of days is invalid."

exit $FAILURE

fi

}

# Function used to cut log files.

f_cutlog(){

# Set name of log file.

LOG_FILE=$1

CUT_FILE=${LOG_FILE}.${TODAY}

FILESIZE=`ls -l $LOG_FILE | awk '{print $5}'`

# Cut the log file if it has not been cut today.

if [ -f $CUT_FILE ]; then

echo "Log Already Cut Today: $CUT_FILE"

elif [ ! -f $LOG_FILE ]; then

echo "Log File Does Not Exist: $LOG_FILE"

elif [ $FILESIZE -eq 0 ]; then

echo "Log File Has Zero Size: $LOG_FILE"

else

# Cut file.

echo "Cutting Log File: $LOG_FILE"

$MV $LOG_FILE $CUT_FILE

$TOUCH $LOG_FILE

fi

}

# Function used to delete log files.

f_deletelog(){

# Set name of log file.

CLEAN_LOG=$1

# Set time limit and confirm it is valid.

CLEAN_DAYS=$2

f_checkdays $CLEAN_DAYS

# Delete old log files if they exist.

find $CLEAN_LOG.[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9] -type f -mtime +$CLEAN_DAYS -exec $RM {} \; 2>/dev/null

}

# Function used to get database parameter values.

f_getparameter(){

if [ -z "$1" ]; then

return

fi

PARAMETER=$1

sqlplus -s /nolog <

set head off pagesize 0 feedback off linesize 200

whenever sqlerror exit 1

conn / as sysdba

select 'a='||value from v\$parameter where name = '$PARAMETER';

EOF

}

# Function to get unique list of directories.

f_getuniq(){

if [ -z "$1" ]; then

return

fi

ARRCNT=0

MATCH=N

x=0

for e in `echo $1`; do

if [ ${#ARRAY[*]} -gt 0 ]; then

# See if the array element is a duplicate.

while [ $x -lt ${#ARRAY[*]} ]; do

if [ "$e" = "${ARRAY[$x]}" ]; then

MATCH=Y

fi

done

fi

if [ "$MATCH" = "N" ]; then

ARRAY[$ARRCNT]=$e

ARRCNT=`expr $ARRCNT+1`

fi

x=`expr $x + 1`

done

echo ${ARRAY[*]}

}

# Parse the command line options.

while getopts a:b:c:d:n:r:u:th OPT; do

case $OPT in

a) ADAYS=$OPTARG

;;

b) BDAYS=$OPTARG

;;

c) CDAYS=$OPTARG

;;

d) DDAYS=$OPTARG

;;

n) NDAYS=$OPTARG

;;

r) RDAYS=$OPTARG

;;

u) UDAYS=$OPTARG

;;

t) TEST=1

;;

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