Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

webload.pl

by JSchmitz (Canon)
on May 15, 2001 at 00:28 UTC ( #80330=sourcecode: print w/ replies, xml ) Need Help??

Category: Web Stuff
Author/Contact Info JGSchmitz@Linuxmail.org
Description: simple webserver load monitor nothing to fancy, probably could be improved on....
#!/usr/bin/perl -w

# Load - current server load

print "Content-type: text/html\n\n";
require 'timelocal.pl';
$Now=time;
@Now=localtime(time);
$Now=&timelocal(@Now);

if ($ENV{PATH_INFO} eq "") {
        $Log = "/usr/local/apache/access_log"; 
} else {
        $Log=$ENV{PATH_INFO};
}

$Last=500;
$Steps=10;

open (h,"$Log") || die "Could not open access log ($!)\n";

print <<EOM;
<META HTTP-EQUIV="Refresh" CONTENT=15> 
<TITLE> $ENV{SERVER_NAME} HTTPD Load </TITLE>

<H1> Current HTTPD Load of 
<A HREF=/>$ENV{SERVER_NAME}</A><HR></H1>
EOM
    # print "Logfile: $Log\n";

    $from=0;
    LINE: while (<h>) {
        $line=$_;
        ($host, $rfc931, $authuser, $timestamp, $request, $status, $by
+tes) =
        /^(\S+) (\S+) (\S+) \[(.+)\] \"(.+)\" (\S+) (\S+)\s/;

        if (!($host && $rfc931 && $authuser && $timestamp 
                                            && $request && $status)) {
            # print(STDERR "$.:$line"); 
            $bad++;
            next LINE;
        }

        $TotalReq++;
        $TotalBytes+=$bytes;

        $_ = $timestamp;
        ($d,$m,$y,$hh,$mm,$ss) = m|(\d+)/(\w\w\w)/(\d+):(\d+):(\d+):(\
+d+).*|;
        $m=index("JanFebMarAprMayJunJulAugSepOctNovDec",$m)/3;
        $iTime= &timelocal($ss,$mm,$hh,$d,$m,$y-1900);
        if ($from == 0) {
                $from=$iTime;
                $diff=$Now-$iTime;
                $Resolution=int($diff/$Steps);
        }
        $diff=$Now-$iTime;
        $iDiff=int((1.0*$diff/$Resolution)+.5); 
        $req[$iDiff]++;
        $bytes[$iDiff]+=$bytes;
    }
    close h;


    # print $bad . "-". $TotalReq;
    print "<TABLE BORDER=0>\n";
    print "<TR><TH>seconds</TH><TH>reqests</TH><TH>Kbytes</TH><TH>requ
+ests chart</TH></TR>\n";
    for ($i=0; $i<=$#req; $i++) {
        $r = $i*$Resolution;
        $q = $req[$i];
        $w = $q*200.*$Steps/$TotalReq;
        $b = int ($bytes[$i]/1024);
        print "<TR ALIGN=RIGHT><TD>$r</TD><TD>$q</TD><TD>$b</TD><TD AL
+IGN=LEFT><HR WIDTH=$w SIZE=14 ALIGN=LEFT></TD></TR>\n";
A
    }
    print "</TABLE><PRE>\n";

    $fullDiff=($Now-$from);
    $fullDiffMin=$fullDiff/60;
    $fullRPH=$TotalReq/$fullDiff*3600.;
    $fullCPS=$TotalBytes/$fullDiff*11./1024.;
    $lastRPH=$req[0]/$Resolution*3600;
    $lastCPS=$bytes[0]/$Resolution*11./1024.;
    $lastDiffMin=$Resolution/60.;
    print "<B>";
    printf "Load in the last %4.1f minutes: %5.0f requests/day, %5.2f 
+kbps.\n",
        $fullDiffMin,$fullRPH*24,$fullCPS;
    printf "Load in the last %4.1f minutes: %5.0f requests/day, %5.2f 
+kbps.\n",
        $lastDiffMin, $lastRPH*24, $lastCPS;
    print `uptime`;
    #print "\nTail of server log:\n</B>";
    #print `tail $Log`;
    print <<EOM;
</B></PRE>
<HR>
EOM

Comment on webload.pl
Download Code

Back to Code Catacombs

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: sourcecode [id://80330]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (8)
As of 2014-12-22 01:00 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (110 votes), past polls