diff --git a/doc/rrd-beginners.pod b/doc/rrd-beginners.pod
index f96b93bcc850399b8e50a381fc7c88a93109e48c..f3c209bfa15b9f65d4d3a76fa703e70c80f478e9 100644 (file)
--- a/doc/rrd-beginners.pod
+++ b/doc/rrd-beginners.pod
=back
RRDtool is designed to store time series of data. With every data
-update, an assosiated time stamp is stored. Time is always expressed
+update, an associated time stamp is stored. Time is always expressed
in seconds passed since epoch (01-01-1970). RRDtool can be installed
on Unix as well as Windows. It comes with a command set to carry out
various operations on RRD databases. This command set can be accessed
This value is also called Primary Data Point B<(PDP)>. In our example
mentioned above, a new PDP is generated every 300 seconds.
-Note, that if you do NOT supply new datapoints exactly every 300 seconds,
+Note, that if you do NOT supply new data points exactly every 300 seconds,
this is not a problem, RRDtool will interpolate the data accordingly.
B<DST> (Data Source Type) defines the type of the DS. It can be
the previous value is greater than 0). Traffic counters on a router
are an ideal candidate for using COUNTER as DST. DERIVE is the same as
COUNTER, but it allows negative values as well. If you want to see the
-rate of I<change> in free diskspace on your server, then you might
+rate of I<change> in free disk space on your server, then you might
want to use the DERIVE data type. ABSOLUTE also saves the rate of
change, but it assumes that the previous value is set to 0. The
difference between the current and the previous value is always equal
# calculate the average of the array
my $tot_mem_ave = $tot_mem_sum/($count);
# create the graph
- RRDs::graph ("/images/mem_$count.png", \
- "--title= Memory Usage", \
- "--vertical-label=Memory Consumption (MB)", \
- "--start=$start_time", \
- "--end=$end_time", \
- "--color=BACK#CCCCCC", \
- "--color=CANVAS#CCFFFF", \
- "--color=SHADEB#9999CC", \
- "--height=125", \
- "--upper-limit=656", \
- "--lower-limit=0", \
- "--rigid", \
- "--base=1024", \
- "DEF:tot_mem=target.rrd:mem:AVERAGE", \
- "CDEF:tot_mem_cor=tot_mem,0,671744,LIMIT,UN,0,tot_mem,IF,1024,/",\
- "CDEF:machine_mem=tot_mem,656,+,tot_mem,-",\
- "COMMENT:Memory Consumption between $start_time",\
- "COMMENT: and $end_time ",\
- "HRULE:656#000000:Maximum Available Memory - 656 MB",\
- "AREA:machine_mem#CCFFFF:Memory Unused", \
+ RRDs::graph ("/images/mem_$count.png",
+ "--title= Memory Usage",
+ "--vertical-label=Memory Consumption (MB)",
+ "--start=$start_time",
+ "--end=$end_time",
+ "--color=BACK#CCCCCC",
+ "--color=CANVAS#CCFFFF",
+ "--color=SHADEB#9999CC",
+ "--height=125",
+ "--upper-limit=656",
+ "--lower-limit=0",
+ "--rigid",
+ "--base=1024",
+ "DEF:tot_mem=target.rrd:mem:AVERAGE",
+ "CDEF:tot_mem_cor=tot_mem,0,671744,LIMIT,UN,0,tot_mem,IF,1024,/",
+ "CDEF:machine_mem=tot_mem,656,+,tot_mem,-",
+ "COMMENT:Memory Consumption between $start_time",
+ "COMMENT: and $end_time ",
+ "HRULE:656#000000:Maximum Available Memory - 656 MB",
+ "AREA:machine_mem#CCFFFF:Memory Unused",
"AREA:tot_mem_cor#6699CC:Total memory consumed in MB");
my $err=RRDs::error;
if ($err) {print "problem generating the graph: $err\n";}