95th percentile not working on 0.8.6h

[titan]

I've just upgraded to 0.8.6h and (noticing some work has been done on 95th), changed one of my graphs from Traffic (bits/sec) to Traffic(bits/sec, 95th percentile)

I've left it a while for the poller to run but no graphs are displaying.

On graph debug mode I see this error :

Notice: Undefined index: nth_percentile_maximum in /home/cacti/cacti-0.8.6h/lib/graph_variables.php on line 320

changing it back to bits/sec works fine, re-changing it to 95th produces the same error. Would seem to be a reproduceable bug ?

Appreciate any help.

[rony]

What 95th variable are you using?

Please post the Comment and Vrule variable you are using.

Also, how many graph items do you have?

[titan]

Hi

you'll have to forgive me as I'm a noobie cacti user.

When I change the graph from "normal" to 95th it adds the following :

+ Item # 9 COMMENT: <HR> COMMENT AVERAGE
+ Item # 10 HRULE: |95:bits:0:max:2| HRULE AVERAGE FF0000
+ Item # 11 COMMENT: (|95:bits:6:max:2| mbit in+out) COMMENT AVERAGE


the graph debug shows this :

Notice: Undefined index: nth_percentile_maximum in /home/cacti/cacti-0.8.6h/lib/graph_variables.php on line 320

Notice: Undefined index: nth_percentile_maximum in /home/cacti/cacti-0.8.6h/lib/graph_variables.php on line 320
/usr/local/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="rb-router1 - Transit Feed - Gi0/2" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="/home/cacti/cacti-0.8.6h/rra/rbrouter1_traffic_in_340.rrd":traffic_in:AVERAGE \
DEF:b="/home/cacti/cacti-0.8.6h/rra/rbrouter1_traffic_in_340.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
AREA:cdefa#00CF00:"Inbound" \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" \
LINE1:cdefe#002A97:"Outbound" \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s" \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s\n" \
COMMENT:"\n" \
HRULE:0#FF0000:"95th Percentile" \
COMMENT:"(0 mbit in+out)"

apologies in advance if its not as simple as just changing the graph type and I've missed something out.

[BSOD2600]

ah-HA! someone else having the exact same error I had also (although, mine was fixed by fixing rrdtool).

[rony]

I will look at it this weekend.

[titan]

Many thanks in advance

[rony]

Patch available on the main cacti site.

[rmcconky]

THe patches have actually made things worse. I am not getting Fatal Errors in the Apache Error_log. I loaded the patches as advised on the page. When I ran the graphs again with 95th percentile it bombed. I then changed all the graphs to Total BW (bits/sec) and I started getting Fatal Errors

[client 127.0.0.1] PHP Fatal error: Call to undefined function: variable_bandwidth_summation() in /var/www/html/cacti/lib/r
rd.php on line 838, referer: http://localhost:8008/cacti/graph_view. ... &leaf_id=8

I am using SSH tunnel to access, thus the localhost.

When that didn't work. I deleted the data sources and the grapsh for the host. I was going to go into Devices and re-create clean graphs to test. Whatever was changed with the host.php file, I now cannot access it. Everything else appears to work, but I get access denied on the host.php. I did check all perms and nothing has changed. The owner, etc are all correct.

[Sun Jan 08 02:48:40 2006] [error] [client 127.0.0.1] (13)Permission denied: access to /cacti/host.php denied, referer: http:
//localhost:8008/cacti/

[titan]

I applied *only* the Nth percentile patch.

The error has gone and the graph displays. However the 95th percentile line is at rock bottom (0Mb in and out). As I understand it additional data collection is not required for 95th so do I presume the data collected to date (and in the future) is correct, but 95th doesn't work ?

Or do I need to amend the datasource from "In/Out bits" to "In/Out bits with 95th Percentile" ?

again, many thanks for such a speedy turnaround.

[rony]

THe patches have actually made things worse. I am not getting Fatal Errors in the Apache Error_log. I loaded the patches as advised on the page. When I ran the graphs again with 95th percentile it bombed. I then changed all the graphs to Total BW (bits/sec) and I started getting Fatal Errors

[client 127.0.0.1] PHP Fatal error: Call to undefined function: variable_bandwidth_summation() in /var/www/html/cacti/lib/r
rd.php on line 838, referer: http://localhost:8008/cacti/graph_view. ... &leaf_id=8

I am using SSH tunnel to access, thus the localhost.

When that didn't work. I deleted the data sources and the grapsh for the host. I was going to go into Devices and re-create clean graphs to test. Whatever was changed with the host.php file, I now cannot access it. Everything else appears to work, but I get access denied on the host.php. I did check all perms and nothing has changed. The owner, etc are all correct.

[Sun Jan 08 02:48:40 2006] [error] [client 127.0.0.1] (13)Permission denied: access to /cacti/host.php denied, referer: http:
//localhost:8008/cacti/

You have localhost permission problems. You need to resolve those, so that the web server can see the files that you patched.

[rony]

I applied *only* the Nth percentile patch.

The error has gone and the graph displays. However the 95th percentile line is at rock bottom (0Mb in and out). As I understand it additional data collection is not required for 95th so do I presume the data collected to date (and in the future) is correct, but 95th doesn't work ?

Or do I need to amend the datasource from "In/Out bits" to "In/Out bits with 95th Percentile" ?

again, many thanks for such a speedy turnaround.

No, Nth percentile uses the data on the range selected on the graph. So, if there is no data on the range, then there is no Nth percentile to calculate.

Nth percentile uses the data in the active rrd for the best resolution that graph has.

Can I see your graphs with debug enabled? Email URL and Login or screen prints?

[titan]

Hi

the graph debug :

/usr/local/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="rb-router1 - RapidSwitch Transit Feed - Gi0/2" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="/home/cacti/cacti-0.8.6h/rra/rbrouter1_traffic_in_340.rrd":traffic_in:AVERAGE \
DEF:b="/home/cacti/cacti-0.8.6h/rra/rbrouter1_traffic_in_340.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
AREA:cdefa#00CF00:"Inbound" \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" \
LINE1:cdefe#002A97:"Outbound" \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s" \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s\n" \
COMMENT:"\n" \
HRULE:0#FF0000:"95th Percentile" \
COMMENT:"(0 mbit in+out)"

if you email me at lee at titaninternet.co.uk I'll happily give you login details, appreciate the assistance.

[titan]

A big thankyou to Tony who spent much time looking into this.

The end resolution was that in addition to changing the graph template from "In/Out bits" to "In/Out Bits with 95th Percentile", the datasource also needs changing in a similar way but *before* the graph template is changed.

if you have changed the graph template already, no problem, just update the datasource, change the graph back to "In/Out bits" and then back again to include 95th.

I now have 95th

again , many thanks.

[Dave96]

Hi,

I'm having the same issue with 95th percentile and the patch does not seem to apply correctly.

I'm on Windows, by the way.

Anyone mind attaching a patched graph_variable.php file?

Thanks

[rony]

What version of Cacti are you running?

You might already have the patch.

If not check out the pre-patched files in the download section.