Oracle Database - DBA survival BLOG

RRDize everything, chapter 2

Oracle Database Server has the most powerful system catalog that allows to query almost any aspect inside an oracle instance.
You can query many v$ fixed views at regular intervals and populate many RRD files through rrdtool: space usage, wait events. system statistics and so on…

Since release 10.1 Oracle has introduced Automatic Workload Repository, a finer version of old good Statspack.
No matter if you are using AWR or statspack, you can rely on their views to collect data for your RRDs.

If you are administering a new instance and you haven’t collected its statistics so far, you can query (as example) the DBA_HIST_BG_EVENT_SUMMARY view to gather all AWR data about wait events. Historical views could be useful also to collect historical data once a week rather than query the fixed views every few minutes doing the hard work twice (you and AWR).

The whole process of gathering performance data and update rrd files can be resumed into the following steps:

– connect to the database
– query the AWR’s views
– build and execute an rrdtool update command
– check if rrd file exists or create it
– update the rrd file

The less rrdtool update commands you will execute, the better the whole process will perform.
Do it in a language you are comfortable with and that supports easily connection descriptors.

Since I’m very comfortable with php, I did it this way.

This is a very basilar script that works greatly for me with good performances:

#!/usr/bin/php -f
< ?php                                         

define('WD','/opt/oracle/awr');
$cs         = $_SERVER['argv'][1];
$user       = 'mymonitoruser';
$pass       = 'mystrongpassword'; 

/* open a new connection */
$ds = oci_connect($user, $pass, $cs)
        or die ("Cannot connect to Oracle Database ".$cs."\n");

/* setting client nls environment */
$sql = "alter session set nls_timestamp_format='MM/DD/YY HH24:MI'";
$stmt = oci_parse($ds, $sql);
oci_execute($stmt);
oci_free_statement($stmt);                                         

/* create directory that will contain rrds (if not exists) */
if(!file_exists(WD.'/'.$cs))
                mkdir(WD.'/'.$cs);
if(!file_exists(WD.'/'.$cs.'/wait'))
                mkdir(WD.'/'.$cs.'/wait');                   

/* function to create new RRDs */
function createRRD($name, $interval, $cs) {
        $hb = $interval*5; //heartbeat
        $cmd="rrdtool create ".WD."/".$cs."/wait/${name}.rrd -s ".$interval." \
                -b \"now -3month\" DS:waits:DERIVE:$hb:0:U \
                DS:mswaited:DERIVE:$hb:0:U \
                RRA:AVERAGE:0.5:1:1440 RRA:AVERAGE:0.5:30:336 \
                RRA:AVERAGE:0.5:120:372 RRA:AVERAGE:0.5:720:730 \
                RRA:MIN:0.5:1:1440 RRA:MIN:0.5:30:336 \
                RRA:MIN:0.5:120:372 RRA:MIN:0.5:720:730 \
                RRA:MAX:0.5:1:1440 RRA:MAX:0.5:30:336 \
                RRA:MAX:0.5:120:372 RRA:MAX:0.5:720:730 \
                RRA:LAST:0.5:1:1440";
        //print $cmd."\n";
        return passthru($cmd);
}                                                                              

/* take the snapshot frequency from dba_hist_wr_control
 to create the RDD with correct heartbeat value */
$sql = 'select extract(hour from snap_interval)*3600 +
extract(minute from snap_interval)*60 as SEED from DBA_HIST_WR_CONTROL';
$stmt = oci_parse($ds, $sql);
oci_execute($stmt);
$row = oci_fetch_assoc($stmt);
$interval = $row['SEED'];
unset($row);
oci_free_statement($stmt);                                              

/* statement definition that will collect
 all snapshots for a certain wait event with more than
 a certain amonut of time waited.
 Gathering ALL EVENTS could be time consuming and useless.
 I fetch rows ordered by event_name rather
 then by date because I can update many values
 into the same rrd with very few rrdupdate commands
*/
$sql = 'select s.END_INTERVAL_TIME END_INTERVAL_TIME,
    g.EVENT_NAME, g.WAIT_CLASS, g.TOTAL_WAITS,
    round(g.TIME_WAITED_MICRO/1000) MS
  from DBA_HIST_SNAPSHOT s,
   dba_hist_bg_event_summary g,
   v$instance i
 where s.SNAP_ID=g.SNAP_ID and g.wait_class!=\'Idle\'
  and g.TIME_WAITED_MICRO&gt;100000
  and s.instance_number=i.instance_number
  and s.instance_number=g.instance_number
 order by 2,1';                                      

/* default prefetch size (148) matches default snapshot retention (24hx7dd) */
$stmt = oci_parse($ds, $sql);
oci_set_prefetch($stmt, 148);
oci_execute($stmt);

$i=0;
$oldevent="";
while ($row = oci_fetch_assoc($stmt)) {
        if ($oldevent != $row['EVENT_NAME']) {
                //NEW EVENT DETECTED: WILL START A NEW UPDATE CMD
                if ($i != 0 &amp;&amp; !empty($cmd)) {
                        /* not the first occurrence,
                         I bet there's something in my buffer */
                        passthru($cmd);
                }
                $cleanName = preg_replace ("([^[:alnum:]_-])","_",$row['EVENT_NAME']);
                // if there is no rrd for this event, I create a new one
                if (!file_exists(WD."/".$cs."/wait/${cleanName}.rrd")) {
                        createRRD($cleanName, $interval, $cs);
                }
                /*
                * I initialize a new update command. This string act as a buffer: I append many
                * values to be updated so I'll update many values in a single command line:
                * less forks of rrdtool and less file opens: the whole update process has an
                * enormous improvement.
                */
                $precmd="rrdtool update ".WD."/".$cs."/wait/${cleanName}.rrd ";
                $lastcmd="rrdtool info ".WD."/".$cs."/wait/${cleanName}.rrd".
                        "| grep last_update | awk '{print \$NF}'";
                $last=trim(`$lastcmd`);
                printf ("%s - %s - last: %d\n", $row['EVENT_NAME'], $cleanName, $last);
                $i=0;
                $cmd=$precmd;
                $oldevent=$row['EVENT_NAME'];
        }
        $time=strtotime($row['END_INTERVAL_TIME']);
        //print "time: ".$time."  last: ".$last."\n";
        if ( $time &gt; $last ) {
                $cmd.=" ".$time.":".$row['TOTAL_WAITS'].":".$row['MS'];
                $i++;
        }
        if ($i &gt;= 40) {
                // when I reach 40 values per commandline I force
                // the update: next loop will reinitialize a new commandline.
                passthru($cmd);
                $cmd=$precmd;
                $i=0;
        }
        unset($row);

}
if ($i != 0) {
        /* one more update pending in my buffer */
        passthru($cmd);
}
oci_free_statement($stmt);
oci_close($ds);
?>

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

#!/usr/bin/php -f

< ?php

define('WD','/opt/oracle/awr');

$cs = $_SERVER['argv'][1];

$user = 'mymonitoruser';

$pass = 'mystrongpassword';

/* open a new connection */

$ds = oci_connect($user, $pass, $cs)

or die ("Cannot connect to Oracle Database ".$cs."\n");

/* setting client nls environment */

$sql = "alter session set nls_timestamp_format='MM/DD/YY HH24:MI'";

$stmt = oci_parse($ds, $sql);

oci_execute($stmt);

oci_free_statement($stmt);

/* create directory that will contain rrds (if not exists) */

if(!file_exists(WD.'/'.$cs))

mkdir(WD.'/'.$cs);

if(!file_exists(WD.'/'.$cs.'/wait'))

mkdir(WD.'/'.$cs.'/wait');

/* function to create new RRDs */

function createRRD($name, $interval, $cs) {

$hb = $interval*5; //heartbeat

$cmd="rrdtool create ".WD."/".$cs."/wait/${name}.rrd -s ".$interval." \

-b \"now -3month\" DS:waits:DERIVE:$hb:0:U \

DS:mswaited:DERIVE:$hb:0:U \

RRA:AVERAGE:0.5:1:1440 RRA:AVERAGE:0.5:30:336 \

RRA:AVERAGE:0.5:120:372 RRA:AVERAGE:0.5:720:730 \

RRA:MIN:0.5:1:1440 RRA:MIN:0.5:30:336 \

RRA:MIN:0.5:120:372 RRA:MIN:0.5:720:730 \

RRA:MAX:0.5:1:1440 RRA:MAX:0.5:30:336 \

RRA:MAX:0.5:120:372 RRA:MAX:0.5:720:730 \

RRA:LAST:0.5:1:1440";

//print $cmd."\n";

return passthru($cmd);

}

/* take the snapshot frequency from dba_hist_wr_control

to create the RDD with correct heartbeat value */

$sql = 'select extract(hour from snap_interval)*3600 +

extract(minute from snap_interval)*60 as SEED from DBA_HIST_WR_CONTROL';

$stmt = oci_parse($ds, $sql);

oci_execute($stmt);

$row = oci_fetch_assoc($stmt);

$interval = $row['SEED'];

unset($row);

oci_free_statement($stmt);

/* statement definition that will collect

all snapshots for a certain wait event with more than

a certain amonut of time waited.

Gathering ALL EVENTS could be time consuming and useless.

I fetch rows ordered by event_name rather

then by date because I can update many values

into the same rrd with very few rrdupdate commands

$sql = 'select s.END_INTERVAL_TIME END_INTERVAL_TIME,

g.EVENT_NAME, g.WAIT_CLASS, g.TOTAL_WAITS,

round(g.TIME_WAITED_MICRO/1000) MS

from DBA_HIST_SNAPSHOT s,

dba_hist_bg_event_summary g,

v$instance i

where s.SNAP_ID=g.SNAP_ID and g.wait_class!=\'Idle\'

and g.TIME_WAITED_MICRO>100000

and s.instance_number=i.instance_number

and s.instance_number=g.instance_number

order by 2,1';

/* default prefetch size (148) matches default snapshot retention (24hx7dd) */

$stmt = oci_parse($ds, $sql);

oci_set_prefetch($stmt, 148);

oci_execute($stmt);

$i=0;

$oldevent="";

while ($row = oci_fetch_assoc($stmt)) {

if ($oldevent != $row['EVENT_NAME']) {

//NEW EVENT DETECTED: WILL START A NEW UPDATE CMD

if ($i != 0 && !empty($cmd)) {

/* not the first occurrence,

I bet there's something in my buffer */

passthru($cmd);

}

$cleanName = preg_replace ("([^[:alnum:]_-])","_",$row['EVENT_NAME']);

// if there is no rrd for this event, I create a new one

if (!file_exists(WD."/".$cs."/wait/${cleanName}.rrd")) {

createRRD($cleanName, $interval, $cs);

}

* I initialize a new update command. This string act as a buffer: I append many

* values to be updated so I'll update many values in a single command line:

* less forks of rrdtool and less file opens: the whole update process has an

* enormous improvement.

$precmd="rrdtool update ".WD."/".$cs."/wait/${cleanName}.rrd ";

$lastcmd="rrdtool info ".WD."/".$cs."/wait/${cleanName}.rrd".

"| grep last_update | awk '{print \$NF}'";

$last=trim(`$lastcmd`);

printf ("%s - %s - last: %d\n", $row['EVENT_NAME'], $cleanName, $last);

$i=0;

$cmd=$precmd;

$oldevent=$row['EVENT_NAME'];

}

$time=strtotime($row['END_INTERVAL_TIME']);

//print "time: ".$time." last: ".$last."\n";

if ( $time > $last ) {

$cmd.=" ".$time.":".$row['TOTAL_WAITS'].":".$row['MS'];

$i++;

}

if ($i >= 40) {

// when I reach 40 values per commandline I force

// the update: next loop will reinitialize a new commandline.

passthru($cmd);

$cmd=$precmd;

$i=0;

}

unset($row);

}

if ($i != 0) {

/* one more update pending in my buffer */

passthru($cmd);

}

oci_free_statement($stmt);

oci_close($ds);

Depending on how many different wait events you have, you’ll have a certain number of rrd files:

# ls -l
total 3864
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 Streams_AQ__enqueue_blocked_on_low_memory.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 20 08:18 buffer_busy_waits.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 control_file_parallel_write.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 control_file_sequential_read.rrd
-rw-r--r-- 1 ludovico ludovico 165304 Apr 30 10:12 cursor__pin_S_wait_on_X.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 db_file_scattered_read.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 db_file_sequential_read.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 events_in_waitclass_Other.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__cache_buffers_chains.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__library_cache.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 11 13:22 latch__library_cache_lock.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 20 08:18 latch__redo_writing.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__row_cache_objects.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__shared_pool.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 library_cache_load_lock.rrd
-rw-r--r-- 1 ludovico ludovico 165304 Apr 15 13:17 library_cache_lock.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_buffer_space.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_parallel_write.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_sequential_read.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_single_write.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_switch_completion.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 11 13:22 log_file_sync.rrd
-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 os_thread_startup.rrd

# ls -l

total 3864

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 Streams_AQ__enqueue_blocked_on_low_memory.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 20 08:18 buffer_busy_waits.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 control_file_parallel_write.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 control_file_sequential_read.rrd

-rw-r--r-- 1 ludovico ludovico 165304 Apr 30 10:12 cursor__pin_S_wait_on_X.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 db_file_scattered_read.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 db_file_sequential_read.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 events_in_waitclass_Other.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__cache_buffers_chains.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__library_cache.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 11 13:22 latch__library_cache_lock.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 20 08:18 latch__redo_writing.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__row_cache_objects.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 latch__shared_pool.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 library_cache_load_lock.rrd

-rw-r--r-- 1 ludovico ludovico 165304 Apr 15 13:17 library_cache_lock.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_buffer_space.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_parallel_write.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_sequential_read.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_single_write.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 log_file_switch_completion.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 11 13:22 log_file_sync.rrd

-rw-r--r-- 1 ludovico ludovico 165304 May 25 15:00 os_thread_startup.rrd

As you can see, they are not so big…

Once you have your data in rrd files, it’s quite simple to script even complex plots with several datasources. Everything depends on the results you want.
This script stack all my wait events for a certain instance: it takes the directory containing all the rrds as first argument and the number of hours we want to be plotted as second argument:

cs=$1
hours=${2:-148}

eventlist=`ls $cs/wait/*rrd`

colors[1]="#000000"
colors[2]="#000055"
colors[3]="#0000aa"
colors[4]="#0000ff"
colors[5]="#550055"
colors[6]="#aa00aa"
colors[7]="#ff00ff"
colors[8]="#550000"
colors[9]="#aa0000"
colors[10]="#ff0000"
colors[11]="#555500"
colors[12]="#aaaa00"
colors[13]="#ffff00"
colors[14]="#005500"
colors[15]="#00aa00"
colors[16]="#00ff00"
colors[17]="#005555"
colors[18]="#00aaaa"
colors[19]="#00ffff"
colors[20]="#555555"
colors[21]="#aaaaaa"

i=0

for event in $eventlist ; do
        if [ $i -eq 0 ] ; then
                end=`rrdtool info $event | grep last_update | awk '{print $NF}'`
                end=`rrdtool info $cs/wait/control_file_parallel_write.rrd | grep last_update | awk '{print $NF}'`
                cmd="rrdtool graph - -s end-${hours}hours -e $end  -v \"milliseconds waited\" -l 0 -w 640 -h 240 -t \"$cs WAIT PROFILE\""
                i=$(($i+1))
        fi
        color=${colors[$i]}
        echo $color
        evname=`basename $event | sed -e s/\.rrd\$//`
        cmd="$cmd  DEF:$evname=$event:mswaited:AVERAGE"
        cmd="$cmd  AREA:${evname}${color}:"$evname":STACK"
        i=$(($i+1))
        if [ $i -eq 20 ] ; then
                i=1
        fi
done
        cmd="$cmd  |display /dev/input"
        echo $cmd
        eval $cmd
exit

cs=$1

hours=${2:-148}

eventlist=`ls $cs/wait/*rrd`

colors[1]="#000000"

colors[2]="#000055"

colors[3]="#0000aa"

colors[4]="#0000ff"

colors[5]="#550055"

colors[6]="#aa00aa"

colors[7]="#ff00ff"

colors[8]="#550000"

colors[9]="#aa0000"

colors[10]="#ff0000"

colors[11]="#555500"

colors[12]="#aaaa00"

colors[13]="#ffff00"

colors[14]="#005500"

colors[15]="#00aa00"

colors[16]="#00ff00"

colors[17]="#005555"

colors[18]="#00aaaa"

colors[19]="#00ffff"

colors[20]="#555555"

colors[21]="#aaaaaa"

i=0

for event in $eventlist ; do

if [ $i -eq 0 ] ; then

end=`rrdtool info $event | grep last_update | awk '{print $NF}'`

end=`rrdtool info $cs/wait/control_file_parallel_write.rrd | grep last_update | awk '{print $NF}'`

cmd="rrdtool graph - -s end-${hours}hours -e $end -v \"milliseconds waited\" -l 0 -w 640 -h 240 -t \"$cs WAIT PROFILE\""

i=$(($i+1))

color=${colors[$i]}

echo $color

evname=`basename $event | sed -e s/\.rrd\$//`

cmd="$cmd DEF:$evname=$event:mswaited:AVERAGE"

cmd="$cmd AREA:${evname}${color}:"$evname":STACK"

i=$(($i+1))

if [ $i -eq 20 ] ; then

i=1

done

cmd="$cmd |display /dev/input"

echo $cmd

eval $cmd

exit

The resulting command is very long:

rrdtool graph - -s end-148hours -e 1243252800 \
 -v "milliseconds waited" -l 0 -w 640 -h 240 -t "mydb WAIT PROFILE"\
 DEF:Streams_AQ__enqueue_blocked_on_low_memory=mydb/wait/Streams_AQ__enqueue_blocked_on_low_memory.rrd:mswaited:AVERAGE \
 AREA:Streams_AQ__enqueue_blocked_on_low_memory#000000:Streams_AQ__enqueue_blocked_on_low_memory:STACK\
 DEF:buffer_busy_waits=mydb/wait/buffer_busy_waits.rrd:mswaited:AVERAGE \
 AREA:buffer_busy_waits#000055:buffer_busy_waits:STACK\
 DEF:control_file_parallel_write=mydb/wait/control_file_parallel_write.rrd:mswaited:AVERAGE \
 AREA:control_file_parallel_write#0000aa:control_file_parallel_write:STACK\
 DEF:control_file_sequential_read=mydb/wait/control_file_sequential_read.rrd:mswaited:AVERAGE \
 AREA:control_file_sequential_read#0000ff:control_file_sequential_read:STACK\
 DEF:cursor__pin_S_wait_on_X=mydb/wait/cursor__pin_S_wait_on_X.rrd:mswaited:AVERAGE \
 AREA:cursor__pin_S_wait_on_X#550055:cursor__pin_S_wait_on_X:STACK\
 DEF:db_file_scattered_read=mydb/wait/db_file_scattered_read.rrd:mswaited:AVERAGE \
 AREA:db_file_scattered_read#aa00aa:db_file_scattered_read:STACK\
 DEF:db_file_sequential_read=mydb/wait/db_file_sequential_read.rrd:mswaited:AVERAGE \
 AREA:db_file_sequential_read#ff00ff:db_file_sequential_read:STACK\
 DEF:events_in_waitclass_Other=mydb/wait/events_in_waitclass_Other.rrd:mswaited:AVERAGE \
 AREA:events_in_waitclass_Other#550000:events_in_waitclass_Other:STACK\
 DEF:latch__cache_buffers_chains=mydb/wait/latch__cache_buffers_chains.rrd:mswaited:AVERAGE \
 AREA:latch__cache_buffers_chains#aa0000:latch__cache_buffers_chains:STACK\
 DEF:latch__library_cache=mydb/wait/latch__library_cache.rrd:mswaited:AVERAGE \
 AREA:latch__library_cache#ff0000:latch__library_cache:STACK\
 DEF:latch__library_cache_lock=mydb/wait/latch__library_cache_lock.rrd:mswaited:AVERAGE \
 AREA:latch__library_cache_lock#555500:latch__library_cache_lock:STACK\
 DEF:latch__redo_writing=mydb/wait/latch__redo_writing.rrd:mswaited:AVERAGE \
 AREA:latch__redo_writing#aaaa00:latch__redo_writing:STACK\
 DEF:latch__row_cache_objects=mydb/wait/latch__row_cache_objects.rrd:mswaited:AVERAGE \
 AREA:latch__row_cache_objects#ffff00:latch__row_cache_objects:STACK\
 DEF:latch__shared_pool=mydb/wait/latch__shared_pool.rrd:mswaited:AVERAGE \
 AREA:latch__shared_pool#005500:latch__shared_pool:STACK\
 DEF:library_cache_load_lock=mydb/wait/library_cache_load_lock.rrd:mswaited:AVERAGE \
 AREA:library_cache_load_lock#00aa00:library_cache_load_lock:STACK\
 DEF:library_cache_lock=mydb/wait/library_cache_lock.rrd:mswaited:AVERAGE \
 AREA:library_cache_lock#00ff00:library_cache_lock:STACK\
 DEF:log_buffer_space=mydb/wait/log_buffer_space.rrd:mswaited:AVERAGE \
 AREA:log_buffer_space#005555:log_buffer_space:STACK\
 DEF:log_file_parallel_write=mydb/wait/log_file_parallel_write.rrd:mswaited:AVERAGE \
 AREA:log_file_parallel_write#00aaaa:log_file_parallel_write:STACK\
 DEF:log_file_sequential_read=mydb/wait/log_file_sequential_read.rrd:mswaited:AVERAGE \
 AREA:log_file_sequential_read#00ffff:log_file_sequential_read:STACK\
 DEF:log_file_single_write=mydb/wait/log_file_single_write.rrd:mswaited:AVERAGE \
 AREA:log_file_single_write#000000:log_file_single_write:STACK\
 DEF:log_file_switch_completion=mydb/wait/log_file_switch_completion.rrd:mswaited:AVERAGE \
 AREA:log_file_switch_completion#000055:log_file_switch_completion:STACK\
 DEF:log_file_sync=mydb/wait/log_file_sync.rrd:mswaited:AVERAGE \
 AREA:log_file_sync#0000aa:log_file_sync:STACK\
 DEF:os_thread_startup=mydb/wait/os_thread_startup.rrd:mswaited:AVERAGE \
 AREA:os_thread_startup#0000ff:os_thread_startup:STACK |display /dev/input

rrdtool graph - -s end-148hours -e 1243252800 \

-v "milliseconds waited" -l 0 -w 640 -h 240 -t "mydb WAIT PROFILE"\

DEF:Streams_AQ__enqueue_blocked_on_low_memory=mydb/wait/Streams_AQ__enqueue_blocked_on_low_memory.rrd:mswaited:AVERAGE \

AREA:Streams_AQ__enqueue_blocked_on_low_memory#000000:Streams_AQ__enqueue_blocked_on_low_memory:STACK\

DEF:buffer_busy_waits=mydb/wait/buffer_busy_waits.rrd:mswaited:AVERAGE \

AREA:buffer_busy_waits#000055:buffer_busy_waits:STACK\

DEF:control_file_parallel_write=mydb/wait/control_file_parallel_write.rrd:mswaited:AVERAGE \

AREA:control_file_parallel_write#0000aa:control_file_parallel_write:STACK\

DEF:control_file_sequential_read=mydb/wait/control_file_sequential_read.rrd:mswaited:AVERAGE \

AREA:control_file_sequential_read#0000ff:control_file_sequential_read:STACK\

DEF:cursor__pin_S_wait_on_X=mydb/wait/cursor__pin_S_wait_on_X.rrd:mswaited:AVERAGE \

AREA:cursor__pin_S_wait_on_X#550055:cursor__pin_S_wait_on_X:STACK\

DEF:db_file_scattered_read=mydb/wait/db_file_scattered_read.rrd:mswaited:AVERAGE \

AREA:db_file_scattered_read#aa00aa:db_file_scattered_read:STACK\

DEF:db_file_sequential_read=mydb/wait/db_file_sequential_read.rrd:mswaited:AVERAGE \

AREA:db_file_sequential_read#ff00ff:db_file_sequential_read:STACK\

DEF:events_in_waitclass_Other=mydb/wait/events_in_waitclass_Other.rrd:mswaited:AVERAGE \

AREA:events_in_waitclass_Other#550000:events_in_waitclass_Other:STACK\

DEF:latch__cache_buffers_chains=mydb/wait/latch__cache_buffers_chains.rrd:mswaited:AVERAGE \

AREA:latch__cache_buffers_chains#aa0000:latch__cache_buffers_chains:STACK\

DEF:latch__library_cache=mydb/wait/latch__library_cache.rrd:mswaited:AVERAGE \

AREA:latch__library_cache#ff0000:latch__library_cache:STACK\

DEF:latch__library_cache_lock=mydb/wait/latch__library_cache_lock.rrd:mswaited:AVERAGE \

AREA:latch__library_cache_lock#555500:latch__library_cache_lock:STACK\

DEF:latch__redo_writing=mydb/wait/latch__redo_writing.rrd:mswaited:AVERAGE \

AREA:latch__redo_writing#aaaa00:latch__redo_writing:STACK\

DEF:latch__row_cache_objects=mydb/wait/latch__row_cache_objects.rrd:mswaited:AVERAGE \

AREA:latch__row_cache_objects#ffff00:latch__row_cache_objects:STACK\

DEF:latch__shared_pool=mydb/wait/latch__shared_pool.rrd:mswaited:AVERAGE \

AREA:latch__shared_pool#005500:latch__shared_pool:STACK\

DEF:library_cache_load_lock=mydb/wait/library_cache_load_lock.rrd:mswaited:AVERAGE \

AREA:library_cache_load_lock#00aa00:library_cache_load_lock:STACK\

DEF:library_cache_lock=mydb/wait/library_cache_lock.rrd:mswaited:AVERAGE \

AREA:library_cache_lock#00ff00:library_cache_lock:STACK\

DEF:log_buffer_space=mydb/wait/log_buffer_space.rrd:mswaited:AVERAGE \

AREA:log_buffer_space#005555:log_buffer_space:STACK\

DEF:log_file_parallel_write=mydb/wait/log_file_parallel_write.rrd:mswaited:AVERAGE \

AREA:log_file_parallel_write#00aaaa:log_file_parallel_write:STACK\

DEF:log_file_sequential_read=mydb/wait/log_file_sequential_read.rrd:mswaited:AVERAGE \

AREA:log_file_sequential_read#00ffff:log_file_sequential_read:STACK\

DEF:log_file_single_write=mydb/wait/log_file_single_write.rrd:mswaited:AVERAGE \

AREA:log_file_single_write#000000:log_file_single_write:STACK\

DEF:log_file_switch_completion=mydb/wait/log_file_switch_completion.rrd:mswaited:AVERAGE \

AREA:log_file_switch_completion#000055:log_file_switch_completion:STACK\

DEF:log_file_sync=mydb/wait/log_file_sync.rrd:mswaited:AVERAGE \

AREA:log_file_sync#0000aa:log_file_sync:STACK\

DEF:os_thread_startup=mydb/wait/os_thread_startup.rrd:mswaited:AVERAGE \

AREA:os_thread_startup#0000ff:os_thread_startup:STACK |display /dev/input

This is the resulting graph:

OHHHHHHHHHHHH COOOOL!!!
😉

Any comment is appreciated! thanks

DBA survival BLOG

Some DBA stuff and lots of Oracle Data Guard

Tag Archives: Oracle Database

Oracle capacity planning with RRDTOOL

Quick Oracle Dataguard check script

Oracle RAC Standard Edition to achieve low cost and high performance