The OS command iostat is normally used to monitoring system input/output device load. This script will provide similar information like iostat but specific for the ASM disks.
For details about iostat (ie cumulative or not, and so on) please refer to the man of iostat.
Script:
#!/bin/ksh
#
# NAME
# asmiostat.sh
#
# DESCRIPTION
# iostat-like output for ASM
# $ asmiostat.sh [-s ASM ORACLE_SID] [-h ASM ORACLE_HOME] [-g Diskgroup]
# [-f disk path filter] [<interval>] [<count>]
#
# NOTES
# Creates persistent SQL*Plus connection to the +ASM instance implemented
# as a ksh co-process
#
# AUTHOR
# Doug Utzig
#
# MODIFIED
# dutzig 08/18/05 - original version
#
ORACLE_SID=+ASM
NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1
NLS_DATE_FORMAT='DD-MON-YYYY HH24:MI:SS'
endOfOutput="_EOP$$"
typeset -u diskgroup
typeset diskgroup_string="Disk Group: All diskgroups"
typeset usage="
$0 [-s ASM ORACLE_SID] [-h ASM ORACLE_HOME] [-g diskgroup] [<interval>] [<count>]
Output:
DiskPath - Path to ASM disk
DiskName - ASM disk name
Gr - ASM disk group number
Dsk - ASM disk number
Reads - Reads
Writes - Writes
AvRdTm - Average read time (in msec)
AvWrTm - Average write time (in msec)
KBRd - Kilobytes read
KBWr - Kilobytes written
AvRdSz - Average read size (in bytes)
AvWrSz - Average write size (in bytes)
RdEr - Read errors
WrEr - Write errors
"
while getopts ":s:h:g:f" option; do
case $option in
s) ORACLE_SID="$OPTARG" ;;
h) ORACLE_HOME="$OPTARG"
LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH ;;
g) diskgroup="$OPTARG"
diskgroup_string="Disk Group: $diskgroup" ;;
f) print '-f option not implemented' ;;
:) print "Option $OPTARG needs a value"
print "$usage"
exit 1 ;;
\?) print "Invalid option $OPTARG"
print "$usage"
exit 1 ;;
esac
done
shift OPTIND-1
typeset -i interval=${1:-10} count=${2:-0} index=0
#
# Verify interval and count arguments are valid
#
(( interval <=0 || count<0 )) && {
print 'Invalid parameter: <interval> must be > 0; <count> must be >= 0'
print "$usage"
exit 1
}
#
# Query to run against v$asm_disk_stat
#
if [[ -z $diskgroup ]]; then
query="select group_number, disk_number, name, path, reads, writes, read_errs, write_errs, read_time, write_time, bytes_read, bytes_written from v\$asm_disk_stat where group_number>0 order by group_number, disk_number;"
else
query="select group_number, disk_number, name, path, reads, writes, read_errs, write_errs, read_time, write_time, bytes_read, bytes_written from v\$asm_disk_stat where group_number=(select group_number from v\$asm_diskgroup_stat where name=regexp_replace('$diskgroup','^\+','')) order by group_number, disk_number;"
fi
#
# Check for version 10.2 or later
#
typeset version minversion=10.2
version=$($ORACLE_HOME/bin/exp </dev/null 2>&1 | grep "Export: " | sed -e 's/^Export: Release \([0-9][0-9]*\.[0-9][0-9]*\).*/\1/')
if ! (print "$version<$minversion" | bc >/dev/null 2>&1); then
print "$0 requires Oracle Database Release $minversion or later"
exit 1
fi
#############################################################################
#
# Fatal error
#----------------------------------------------------------------------------
function fatalError {
print -u2 -- "Error: $1"
exit 1
}
#############################################################################
#
# Drain all of the sqlplus output - stop when we see our well known string
#----------------------------------------------------------------------------
function drainOutput {
typeset dispose=${1:-'dispose'} output
while :; do
read -p output || fatalError 'Read from co-process failed [$0]'
if [[ $QUERYDEBUG == ON ]]; then print $output; fi
if [[ $output == $endOfOutput* ]]; then break; fi
[[ $dispose != 'dispose' ]] && print -- $output
done
}
#############################################################################
#
# Ensure the instance is running and it is of type ASM
#----------------------------------------------------------------------------
function verifyASMinstance {
typeset asmcmdPath=$ORACLE_HOME/bin/asmcmd
[[ ! -x $asmcmdPath ]] && fatalError "Invalid ORACLE_HOME $ORACLE_HOME: $asmcmdPath does not exist"
$asmcmdPath pwd 2>/dev/null | grep -q '^\+$' || fatalError "$ORACLE_SID is not an ASM instance"
}
#############################################################################
#
# Start the sqlplus coprocess
#----------------------------------------------------------------------------
function startSqlplus {
# start sqlplus, setup the env
$ORACLE_HOME/bin/sqlplus -s '/ as sysdba' |&
print -p 'whenever sqlerror exit failure' \
&& print -p "set pagesize 9999 linesize 9999 feedback off heading off" \
&& print -p "prompt $endOfOutput" \
|| fatalError 'Write to co-process failed (startSqlplus)'
drainOutput dispose
}
#############################################################################
#############################################################################
# MAIN
#----------------------------------------------------------------------------
verifyASMinstance
startSqlplus
#
# Loop as many times as requested or forever
#
while :; do
print -p "$query" \
&& print -p "prompt $endOfOutput" \
|| fatalError 'Write to co-process failed (collectData)'
stats=$(drainOutput keep)
print -- "$stats\nEOL"
index=index+1
(( count<index && count>0 )) && break
sleep $interval
done | \
awk '
BEGIN { firstSample=1
}
/^EOL$/ {
firstSample=0; firstLine=1
next
}
{
path=$4
if (path ~ /^ *$/) next
group[path]=$1; disk[path]=$2; name[path]=$3
reads[path]=$5; writes[path]=$6
readErrors[path]=$7; writeErrors[path]=$8
readTime[path]=$9; writeTime[path]=$10
readBytes[path]=$11; writeBytes[path]=$12
# reads and writes
readsDiff[path]=reads[path]-readsPrev[path]
writesDiff[path]=writes[path]-writesPrev[path]
# read errors and write errors
readErrorsDiff[path]=readErrors[path]-readErrorsPrev[path]
writeErrorsDiff[path]=writeErrors[path]-writeErrorsPrev[path]
# read time and write time
readTimeDiff[path]=readTime[path]-readTimePrev[path]
writeTimeDiff[path]=writeTime[path]-writeTimePrev[path]
# average read time and average write time in msec (data provided in csec)
avgReadTime[path]=0; avgWriteTime[path]=0
if ( readsDiff[path] ) avgReadTime[path]=(readTimeDiff[path]/readsDiff[path])*1000
if ( writesDiff[path]) avgWriteTime[path]=(writeTimeDiff[path]/writesDiff[path])*1000
# bytes and KB read and bytes and KB written
readBytesDiff[path]=readBytes[path]-readBytesPrev[path]
writeBytesDiff[path]=writeBytes[path]-writeBytesPrev[path]
readKb[path]=readBytesDiff[path]/1024
writeKb[path]=writeBytesDiff[path]/1024
# average read size and average write size
avgReadSize[path]=0; avgWriteSize[path]=0
if ( readsDiff[path] ) avgReadSize[path]=readBytesDiff[path]/readsDiff[path]
if ( writesDiff[path] ) avgWriteSize[path]=writeBytesDiff[path]/writesDiff[path]
if (!firstSample) {
if (firstLine) {
"date" | getline now; close("date")
printf "\n"
printf "Date: %s Interval: %d secs %s\n\n", now, '"$interval"', "'"$diskgroup_string"'"
printf "%-40s %2s %3s %8s %8s %6s %6s %8s %8s %7s %7s %4s %4s\n", \
"DiskPath - DiskName","Gr","Dsk","Reads","Writes","AvRdTm",\
"AvWrTm","KBRd","KBWr","AvRdSz","AvWrSz", "RdEr", "WrEr"
firstLine=0
}
printf "%-40s %2s %3s %8d %8d %6.1f %6.1f %8d %8d %7d %7d %4d %4d\n", \
path " - " name[path], group[path], disk[path], \
readsDiff[path], writesDiff[path], \
avgReadTime[path], avgWriteTime[path], \
readKb[path], writeKb[path], \
avgReadSize[path], avgWriteSize[path], \
readErrorsDiff[path], writeErrorsDiff[path]
}
readsPrev[path]=reads[path]; writesPrev[path]=writes[path]
readErrorsPrev[path]=readErrors[path]; writeErrorsPrev[path]=writeErrors[path]
readTimePrev[path]=readTime[path]; writeTimePrev[path]=writeTime[path]
readBytesPrev[path]=readBytes[path]; writeBytesPrev[path]=writeBytes[path]
}
END {
}
'
exit 0
Ejemplo de salida del script:
DiskPath - DiskName Gr Dsk Reads Writes AvRdTm AvWrTm KBRd KBWr AvRdSz AvWrSz RdEr WrEr /dev/asmdisk14 - DATA_0000 2 0 0 4 0.0 5.0 0 16 0 4096 0 0
/dev/asmdisk4 - DATA_0001 2 1 10 0 17.0 0.0 0 0 0 0 0 0
/dev/asmdisk17 - DATA_0002 2 2 0 1 0.0 0.0 0 0 0 512 0 0
/dev/asmdisk5 - DATA_0003 2 3 0 0 0.0 0.0 0 0 0 0 0 0
/dev/asmdisk16 - DATA_0004 2 4 3 3 6.7 3.3 0 0 0 0 0 0
/dev/asmdisk23 - DATA_0005 2 5 0 0 0.0 0.0 0 0 0 0 0 0
Ref: ASMIOSTAT Script to collect iostats for ASM disks (Doc ID 437996.1)
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