linux performance April 23

[root@localhost ~]# history
    1  top
    2  dd if=/dev/zero of=/dev/null &
    3  top
    4  mount | grep proc
    5  cd /proc
    6  ls
    7  less meminfo
    8  top
    9  history
   10  top
   11  reboot
   12  git clone https://github.com/sandervanvugt/performance
   13  cd performance/
   14  ls
   15  history
   16  ./countdown 12
   17  free -m
   18  top
   19  free -m
   20  grep ctive /proc/meminfo
   21  vmstat 2 25
   22  top
   23  reboot
   24  top
   25  ps aux | grep defunc
   26  ps faux | grep -C 3 defunc
   27  kill 2486
   28  ps faux | grep -C 3 defunc
   29  kill -9 2486
   30  ps faux | grep -C 3 defunc
   31  kill -SIGCHLD 2485
   32  ps faux | grep -C 3 defunc
   33  kill 2485
   34  ps faux | grep -C 3 defunc
   35  cd /proc
   36  touch hello
   37  echo a > hello
   38  ls
   39  ls -l
   40  ls
   41  cd 1979
   42  ls
   43  cat cmdline
   44  cat status
   45   history
   46  ls
   47  cat oom_score
   48  cd ..
   49  cd
   50  podman run -it docker.io/library/nginx sh
   51  history
   52  cd /proc
   53  ls
   54  less cpuinfo
   55  lscpu
   56  ls
   57  cat partitions
   58  lsblk
   59  cd
   60  echo h > /proc/sysrq-trigger
   61  dmesg
   62  #echo f > /proc/sysrq-trigger
   63  history -w
   64  top
   65  ps aux | grep defunc
   66  ps faux | grep -C 3 defunc
   67  kill 2486
   68  ps faux | grep -C 3 defunc
   69  kill -9 2486
   70  ps faux | grep -C 3 defunc
   71  kill -SIGCHLD 2485
   72  ps faux | grep -C 3 defunc
   73  kill 2485
   74  ps faux | grep -C 3 defunc
   75  cd /proc
   76  touch hello
   77  echo a > hello
   78  ls
   79  ls -l
   80  ls
   81  cd 1979
   82  ls
   83  cat cmdline
   84  cat status
   85   history
   86  ls
   87  cat oom_score
   88  cd ..
   89  cd
   90  podman run -it docker.io/library/nginx sh
   91  history
   92  cd /proc
   93  ls
   94  less cpuinfo
   95  lscpu
   96  ls
   97  cat partitions
   98  lsblk
   99  cd
  100  echo h > /proc/sysrq-trigger
  101  dmesg
  102  #echo f > /proc/sysrq-trigger
  103  history -w
  104  sync
  105  echo f > /proc/sysrq-trigger
  106  vmstat 2 20
  107  man vmstat
  108  systemd-analyze blame
  109  top
  110  cd performance/
  111  ./zombie
  112  journalctl
  113  ps aux | grep gnome-shell
  114  cat /proc/3447/oom_score
  115  cat /proc/3628/oom_score
  116  cd /proc/3447
  117  ls
  118  cat oom_score_adj
  119  echo -200 > oom_score_adj
  120  cat oom_score
  121  history -w
  122  journalctl
  123  ps aux | grep gnome-shell
  124  cat /proc/3447/oom_score
  125  cat /proc/3628/oom_score
  126  cd /proc/3447
  127  ls
  128  cat oom_score_adj
  129  echo -200 > oom_score_adj
  130  cat oom_score
  131  history -w
  132  sync
  133  echo f > /proc/sysrq-trigger
  134  journalctl
  135  history
  136  cd
  137  cd performance/
  138  ./countdown 12
  139  dmesg
  140  history
  141  ls
  142  cd
  143  cd /proc
  144  ls
  145  cd sys
  146  ls
  147  cd kernel/
  148  ls
  149  cat sysrq
  150  man proc
  151  cat pid_max
  152  echo $(( 2 * 65535 ))
  153  echo 131070 > pid_max
  154  cat pid_max
  155  cd ../vm
  156  ls
  157  cat swappiness
  158  echo 30 > swappiness
  159  cat swappiness
  160  cat oom_kill_allocating_task
  161  free -m
  162  echo 3 > drop_caches
  163  free -m
  164  cat dirty_writeback_centisecs
  165  cat dirty_expire_centisecs
  166  free -m
  167  echo 500 > nr_hugepages
  168  free -m
  169  cd ..
  170  cd net
  171  ls
  172  cd ipv6/
  173  ls
  174  cd ../core/
  175  ls
  176  cd ..
  177  sysctl -a
  178  sysctl -a | grep swappi
  179  sysctl -a | grep disable
  180  ip a
  181  pwd
  182  echo 1 > ipv6/conf/all/disable_ipv6
  183  ip a
  184  echo 0 > ipv6/conf/all/disable_ipv6
  185  strace -c ls
  186  less /proc/meminfo
  187  cd
  188  vim /etc/sysctl.conf
  189  cd /usr/lib/sysctl.d/
  190  ls
  191  vim 50-pid-max.conf
  192  cd /etc/sysctl.d/
  193  vim sander.conf
  194  cd /proc/sys/kernel/
  195  cat pid_max
  196  cd -
  197  cim sander.conf
  198  vim sander.conf
  199  cd
  200  dnf install -y tuned
  201  tuned-adm --list
  202  tuned-adm list
  203  systemctl status tuned
  204  systemctl start tuned
  205  tuned-adm recommend
  206  cd /usr/lib/tuned/
  207  ls
  208  mkdir /etc/tuned/virtual-guest
  209  cp virtual-guest/* /etc/tuned/virtual-guest/
  210  cd /etc/tuned/virtual-guest/
  211  ls
  212  vim tuned.conf
  213  tuned-adm profile virtual-guest
  214  reboot
  215  cat /dev/sda
  216  sysctl | grep swapp
  217  sysctl -a | grep swapp
  218  cd /etc/tuned/
  219  ls
  220  vim tuned-main.conf
  221  cd
  222  cd performance/
  223  ./countdown 12
  224  history
  225  sysctl --help
  226  ls
  227  vim stress1.service
  228  cat stress2.service
  229  cp *service /etc/systemd/system/
  230  systemctl start stress1.service
  231  systemctl start stress2.service
  232  top
  233  cat /sys/bus/cpu/devices/cpu1/online
  234  echo 0 > /sys/bus/cpu/devices/cpu1/online
  235  top
  236  echo 1 > /sys/bus/cpu/devices/cpu1/online
  237  top
  238  man systemd.resource-control
  239  dnf install httpd
  240  systemctl edit httpd.service
  241  systemctl cat httpd.service
  242  systemctl start httpd.service
  243  systemctl status httpd.service
  244  systemd-cgtop
  245  systemd-cgls
  246  systemctl show --all httpd.service
  247  systemctl edit httpd.service
  248  systemctl restart httpd.service
  249  systemctl status httpd.service
  250  systemctl set-property sshd.service MemoryMax=16M
  251  systemctl cat sshd.service
  252  systemctl set-property system.slice CPUShares=2048
  253  systemctl status system.slice
  254  echo 0 > /sys/bus/cpu/devices/cpu1/online
  255  top
  256  history
  257  iotop
  258  man proc
  259  cd /proc/sys/kernel/
  260  ls
  261  cat task_delayacct
  262  echo 1 > task_delayacct
  263  iotop
  264  top
  265  killall dd
  266  cd /sys/block/sda/
  267  ls
  268  cd queue/
  269  ls
  270  cat scheduler
  271  echo kyber > scheduler
  272  cat scheduler
  273  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  274  echo none > scheduler
  275  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  276  history
  277  top
  278  history
  279  history -w
  280  history