ab: Cannot use concurrency level greater than total number of requests Usage: ab [options] [http[s]://]hostname[:port]/path Options are:     -n requests     Number of requests to perform     -c concurrency  Number of multiple requests to make (µ¿½ÃÁ¢¼Ó»óȲ)     -t timelimit    Seconds to max. wait for responses     -b windowsize   Size of TCP send/receive buffer, in bytes     -p postfile     File containing data to POST. Remember also to set -T     -u putfile      File containing data to PUT. Remember also to set -T     -T content-type Content-type header for POSTing, eg.                     'application/x-www-form-urlencoded'                     Default is 'text/plain'     -v verbosity    How much troubleshooting info to print     -w              Print out results in HTML tables     -i              Use HEAD instead of GET     -x attributes   String to insert as table attributes     -y attributes   String to insert as tr attributes     -z attributes   String to insert as td or th attributes     -C attribute    Add cookie, eg. 'Apache=1234. (repeatable)     -H attribute    Add Arbitrary header line, eg. 'Accept-Encoding: gzip'                     Inserted after all normal header lines. (repeatable)     -A attribute    Add Basic WWW Authentication, the attributes                     are a colon separated username and password.     -P attribute    Add Basic Proxy Authentication, the attributes                     are a colon separated username and password.     -X proxy:port   Proxyserver and port number to use     -V              Print version number and exit     -k              Use HTTP KeepAlive feature     -d              Do not show percentiles served table.     -S              Do not show confidence estimators and warnings.     -g filename     Output collected data to gnuplot format file.     -e filename     Output CSV file with percentages served     -r              Don't exit on socket receive errors.     -h              Display usage information (this message)     -Z ciphersuite  Specify SSL/TLS cipher suite (See openssl ciphers)     -f protocol     Specify SSL/TLS protocol (SSL2, SSL3, TLS1, or ALL)
 
  
        
         
        
        
        
        
        
        
        
         
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