not able to start apache server

[ummar]

[Mon Feb 20 14:23:39.456507 2017] [ssl:warn] [pid 4416:tid 404] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Mon Feb 20 14:23:39.503310 2017] [mpm_winnt:notice] [pid 4416:tid 404] AH00354: Child: Starting 150 worker threads.
[Mon Feb 20 14:23:47.069365 2017] [:error] [pid 4416:tid 1336] [client 191.96.249.54:37001] PHP Fatal error: Out of memory (allocated 7602176) (tried to allocate 1792 bytes) in C:\\xampp\\htdocs\\wp-includes\\deprecated.php on line 3405
[Mon Feb 20 14:23:47.069365 2017] [:error] [pid 4416:tid 1296] [client 191.96.249.54:51965] PHP Fatal error: Out of memory (allocated 5767168) (tried to allocate 28672 bytes) in C:\\xampp\\htdocs\\wp-includes\\post-template.php on line 664
[Mon Feb 20 14:23:47.069365 2017] [:error] [pid 4416:tid 1360] [client 191.96.249.54:57025] PHP Fatal error: Out of memory (allocated 4718592) (tried to allocate 7168 bytes) in C:\\xampp\\htdocs\\wp-includes\\link-template.php on line 275
[Mon Feb 20 14:23:47.069365 2017] [:error] [pid 4416:tid 1328] [client 191.96.249.54:40149] PHP Fatal error: Out of memory (allocated 4456448) (tried to allocate 2688 bytes) in C:\\xampp\\htdocs\\wp-includes\\general-template.php on line 1191
[Mon Feb 20 14:23:47.287766 2017] [:error] [pid 4416:tid 1320] [client 191.96.249.70:43914] PHP Fatal error: Out of memory (allocated 4718592) (tried to allocate 7168 bytes) in C:\\xampp\\htdocs\\wp-includes\\link-template.php on line 275
[Mon Feb 20 14:23:56.772635 2017] [mpm_winnt:error] [pid 4416:tid 5004] AH00326: Server ran out of threads to serve requests. Consider raising the ThreadsPerChild setting