Block Busting

SADF(1)                       Linux User's Manual                      SADF(1)

NAME

       sadf - Display data collected by sar in multiple formats.

SYNOPSIS

       sadf [ -d | -D | -H | -p | -x ] [ -t ] [ -V ] [ -P { cpu | ALL } ] [ -s

       [ hh:mm:ss ] ] [ -e [ hh:mm:ss ] ] [ -- sar_options...  ] [ interval  [

       count ] ] [ datafile ]

DESCRIPTION

       The sadf command is used for displaying the contents of data files cre-

       ated by the sar(1) command. But unlike sar, sadf can write its data  in

       many  different  formats.  The default format is one that can easily be

       handled by pattern processing commands like awk (see option -p).

       The sadf command extracts and writes to standard output  records  saved

       in  the datafile file. This file must have been created by a version of

       sar which is compatible with that of sadf.   If  datafile  is  omitted,

       sadf uses the standard system activity file, the /var/log/sa/sadd file,

       where the dd parameter indicates the current day.

       The interval and count parameters are used to tell sadf to select count

       records  at  interval  second  intervals. If the count parameter is not

       set, then all the records saved in the data file will be displayed.

       All the activity flags of sar may be entered on  the  command  line  to

       indicate  which  activities are to be reported. Before specifying them,

       put a pair of dashes (--) on the command line in order not  to  confuse

       the  flags  with  those of sadf.  Not specifying any flags selects only

       CPU activity.

실행 결과

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$ sadf
TEST    604 1343229001  all %user   0.50
TEST    604 1343229001  all %nice   0.00
TEST    604 1343229001  all %system 1.75
TEST    604 1343229001  all %iowait 0.01
TEST    604 1343229001  all %steal  0.00
TEST    604 1343229001  all %idle   97.74
TEST    604 1343229601  all %user   0.46
TEST    604 1343229601  all %nice   0.04
TEST    604 1343229601  all %system 1.72
TEST    604 1343229601  all %iowait 0.00
TEST    604 1343229601  all %steal  0.00
TEST    604 1343229601  all %idle   97.77
TEST    603 1343230201  all %user   0.48
TEST    603 1343230201  all %nice   0.00
TEST    603 1343230201  all %system 1.74
TEST    603 1343230201  all %iowait 0.00
TEST    603 1343230201  all %steal  0.00
TEST    603 1343230201  all %idle   97.79
TEST    604 1343230801  all %user   0.47
TEST    604 1343230801  all %nice   0.00
TEST    604 1343230801  all %system 1.72
TEST    604 1343230801  all %iowait 0.00
TEST    604 1343230801  all %steal  0.00
TEST    604 1343230801  all %idle   97.80
TEST    605 1343231401  all %user   0.47
TEST    605 1343231401  all %nice   0.00
TEST    605 1343231401  all %system 1.73
TEST    605 1343231401  all %iowait 0.00
TEST    605 1343231401  all %steal  0.00
TEST    605 1343231401  all %idle   97.79
TEST    604 1343232001  all %user   0.47
TEST    604 1343232001  all %nice   0.00
TEST    604 1343232001  all %system 1.74
TEST    604 1343232001  all %iowait 0.01
TEST    604 1343232001  all %steal  0.00
TEST    604 1343232001  all %idle   97.78

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sysctl이라고 시스템 커널과 관련하여 다양한

설정값을 확인할 수 있다. (루트권한)

# sysctl -a |grep port
sunrpc.max_resvport = 1023
sunrpc.min_resvport = 665
dev.parport.default.spintime = 500
dev.parport.default.timeslice = 200
net.ipv4.ip_local_port_range = 32768 61000
fs.nfs.nlm_tcpport = 0
fs.nfs.nlm_udpport = 0

따라서 요렇게 수행하면 범위가 나온다.

# sysctl -a |grep net.ipv4.ip_local_port_range
net.ipv4.ip_local_port_range = 32768 61000

생각보다 간단하게 찾아진다..