错误日志报这些错是啥意思

[mpm_winnt:notice] [pid 11720:tid 648] AH00364: Child: All worker threads have exited.

[Wed Jun 30 11:30:54.124288 2021] [mpm_winnt:notice] [pid 11092:tid 696] AH00430: Parent: Child process 11720 exited successfully.

[Wed Jun 30 11:30:54.967957 2021] [mpm_winnt:notice] [pid 3800:tid 696] AH00455: Apache/2.4.35 (Win64) PHP/5.4.8 configured -- resuming normal operations

[Wed Jun 30 11:30:54.967957 2021] [mpm_winnt:notice] [pid 3800:tid 696] AH00456: Apache Lounge VC15 Server built: Sep 19 2018 16:08:47

[Wed Jun 30 11:30:54.967957 2021] [core:notice] [pid 3800:tid 696] AH00094: Command line: 'C:\\Apache24\\bin\\httpd.exe -d C:/Apache24'

[Wed Jun 30 11:30:54.967957 2021] [mpm_winnt:notice] [pid 3800:tid 696] AH00418: Parent: Created child process 2820

[Wed Jun 30 11:30:55.733477 2021] [mpm_winnt:notice] [pid 2820:tid 648] AH00354: Child: Starting 512 worker threads.