c — состояние пула PHP-FPM процесса last-request-cpu

Я установил PHP и включил функцию FPM, но я не уверен в данных о состоянии FPM (например, процесс last-request-cpu), ниже приведен мой php-fpm.conf.

[www]
; Unix user/group of processes
user = www-data
group = www-data

; Chdir to this directory at the start.
chdir = /

; The address on which to accept FastCGI requests.
listen = /var/run/phpfpm/$pool_php5-fpm.sock

; Set listen(2) backlog. A value of '-1' means unlimited.
listen.backlog = -1

; Set permissions for unix socket.
listen.mode = 0666

; Pool configuration.
pm = dynamic
pm.max_children = 10
pm.start_servers = 4
pm.min_spare_servers = 2
pm.max_spare_servers = 6
pm.max_requests = 500

; The URI to view the FPM status page.
pm.status_path = /status

; The ping URI to call the monitoring page of FPM.
ping.path = /ping

; The access log file.
access.log = /var/log/phpfpm/$pool_php-fpm.access.log

; The access log format.
access.format = %R - %u %t "%m %r%Q%q" %s %f %{mili}d %{kilo}M %C%%

; The log file for slow requests.
slowlog = /var/log/phpfpm/$pool_php-fpm.log.slow

; The timeout for serving a single request after which a PHP backtrace will be
; dumped to the 'slowlog' file. A value of '0s' means 'off'.
request_slowlog_timeout = 5

; Limits the extensions of the main script FPM will allow to parse.
security.limit_extensions = .php

Я включил pm.status_path = / status для просмотра результата состояния FPM, как показано ниже:

<?xml version="1.0" ?>
<status>
<pool>www</pool>
<process-manager>dynamic</process-manager>
<start-time>1418352728</start-time>
<start-since>21936</start-since>
<accepted-conn>20</accepted-conn>
<listen-queue>0</listen-queue>
<max-listen-queue>0</max-listen-queue>
<listen-queue-len>0</listen-queue-len>
<idle-processes>3</idle-processes>
<active-processes>1</active-processes>
<total-processes>4</total-processes>
<max-active-processes>1</max-active-processes>
<max-children-reached>0</max-children-reached>
<slow-requests>0</slow-requests>
<processes>
<process>
<pid>11</pid>
<state>Idle</state>
<start-time>1418352728</start-time>
<start-since>21936</start-since>
<requests>5</requests>
<request-duration>5391</request-duration>
<request-method>GET</request-method>
<request-uri>/status?xml&amp;full</request-uri>
<content-length>0</content-length>
<user>-</user><script>-</script>
<last-request-cpu>0.00</last-request-cpu>
<last-request-memory>262144</last-request-memory>
</process>
<process>
<pid>12</pid>
<state>Idle</state>
<start-time>1418352728</start-time>
<start-since>21936</start-since>
<requests>5</requests>
<request-duration>3365</request-duration>
<request-method>GET</request-method>
<request-uri>/status?xml&amp;full</request-uri>
<content-length>0</content-length>
<user>-</user><script>-</script>
<last-request-cpu>297.18</last-request-cpu>
<last-request-memory>262144</last-request-memory>
</process>
</processes>
</status>

Я не знаю, почему значение элемента last-request-cpu 297.18 больше 100, я хотел бы знать, как использовать его в качестве отслеживаемой информации.
Спасибо