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Oracle Alert log script

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# 1  
Old 05-18-2012
Oracle Alert log script
Hi,
I'm trying to write a shell script on HP-UX to search through Oracle alert logs for errors which always start with ORA-. If it does find an error I'd like it to print the date line (which precedes the error by a line or two normally) as well as the error line. So in the example below I'd like it to print the two bolded lines.

Can anyone give me a hint on this, maybe simply using grep or awk?

Code:
Fri May 18 12:25:22 2012
LNS: Standby redo logfile selected for thread 1 sequence 315357 for destination LOG_ARCHIVE_DEST_6
Fri May 18 12:25:26 2012
ARC3: Standby redo logfile selected for thread 1 sequence 315356 for destination LOG_ARCHIVE_DEST_2
Fri May 18 12:25:28 2012
ARC1: Standby redo logfile selected for thread 1 sequence 315356 for destination LOG_ARCHIVE_DEST_4
Fri May 18 12:25:31 2012
ARC0: Standby redo logfile selected for thread 1 sequence 315356 for destination LOG_ARCHIVE_DEST_6
Fri May 18 12:25:37 2012
Errors in file /u02/oracle/admin/prod/bdump/prod1/prod1_arc0_4457042.trc:
ORA-16401: archivelog rejected by RFS
Fri May 18 12:31:36 2012
Thread 1 advanced to log sequence 315358
  Current log# 23 seq# 315358 mem# 0: /dev/rdprod_0000501
  Current log# 23 seq# 315358 mem# 1: /dev/rdprod_0000502
Fri May 18 12:31:37 2012
LNS: Standby redo logfile selected for thread 1 sequence 315358 for destination LOG_ARCHIVE_DEST_2
Fri May 18 12:31:38 2012
LNS: Standby redo logfile selected for thread 1 sequence 315358 for destination LOG_ARCHIVE_DEST_6
Fri May 18 12:31:47 2012

Moderator's Comments:
Mod Comment Code tags for code, please.
Last edited by Corona688; 05-18-2012 at 04:16 PM..
# 2  
Old 05-18-2012
Code:
$ cat oralog.awk

# Recall N lines ago up to 9 lines
function last(N)
{
        if(N>L) return("");
        return(LINE[(L-N)%10]);
}

{ LINE[(++L)%10]=$0 } # Remember line for later

# Lines beginning with ORA
/^ORA-/ {
        # Hunt backwards for a line ending in HH:MM:SS YYYY
        for(N=1; N<=9; N++)
        if(last(N) ~ /[0-9][0-9]:[0-9][0-9]:[0-9][0-9] [0-9][0-9][0-9][0-9]$/)
                        break;

        print last(N); # Print the timestamp
        print; # Print the error
}

$ awk -f oralog.awk data

Fri May 18 12:25:37 2012
ORA-16401: archivelog rejected by RFS

$

If awk doesn't work, try nawk or gawk.
These 3 Users Gave Thanks to Corona688 For This Post:
capesong eddgrace Scott
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