php-fpm.conf和www.conf配置问题

最近搞这两个配置文件, 遇到好多部问题, 现在记录下来.

error_log

; Error log file
; If it's set to "syslog", log is sent to syslogd instead of being written
; in a local file.
; Note: the default prefix is /usr/local/var
; Default Value: log/php-fpm.log
; error_log = log/php70-fpm.log

这个搞好好久, 都没有生效, 日志都没有写入, 但是文件是有生成了, 而且也有旧的日记同容, 不知以前是怎样生成和.

catch_workers_output

; Redirect worker stdout and stderr into main error log. If not set, stdout and
; stderr will be redirected to /dev/null according to FastCGI specs.
; Note: on highloaded environement, this can cause some delay in the page
; process time (several ms).
; Default Value: no
; catch_workers_output = yes

这个怎样设置都没有效果, 网上说设置它可以写入php的error_log, 但无论值是yes或者no, 都不会影响php的error_log.

error_log和log_errors

;php_admin_value[error_log] = /var/log/fpm-php.www.log
;php_admin_flag[log_errors] = on

error_log和log_errors和php.ini文件的error_log和log_errors是相同的, 只过前者设置了会复盖后者.