Description:
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I have installed a PHP and enable the FPM function, but i feel uncertain about the FPM status data(like the process last-request-cpu), below is my php-fpm.conf detail.
[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

--------------------------------------------------------------
I have enable the pm.status_path = /status to view the FPM status result as below:
<?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>Running</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>
I dont know why the element last-request-cpu value 297.18 is more than 100, means use the cpu 297.18% or what's the last-request-cpu unit.. 

Thanks