Aplicação feita na versão 7.1 com php 5.4 travando com 3 usuários simultâneos

Amigos boa tarde,

Esse é meu 1º post aqui no fórum, caso não seja o local mais indicado, favor me corrigir onde devo lançar minha dúvida.
Temos aqui na empresa uma aplicação simples (basicamente cadastro e consultas) feita em SC 7.1 com o php na versão 5.4.
Acontece que quando mais de 3 usuários se logam na aplicação (acreditem, apenas logam) o php do servidor trava sendo necessário reiniciar várias vezes durante o dia.

Localizei na pasta do sc um acript que vou compartilhar alguns erros de log que a está sendo registrado (somente no dia de hoje, não sei se com isso vocês conseguem me ajudar):

[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 4792 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 6100 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 5644 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 5924 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 8528 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 8596 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 9000 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 9012 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 7856 graceful kill fail, sending SIGKILL
[Thu Dec 27 14:32:49.431005 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 3260 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:28:07.762805 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 3784 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:28:07.762805 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 8432 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:32:13.787405 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 7652 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:32:13.787405 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 592 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:38:25.824605 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 1260 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:38:25.824605 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 7064 graceful kill fail, sending SIGKILL
[Thu Dec 27 15:38:25.824605 2018] [fcgid:warn] [pid 8600:tid 228] mod_fcgid: process 8992 graceful kill fail, sending SIGKILL
[Thu Dec 27 16:21:39.148912 2018] [mpm_winnt:notice] [pid 7008:tid 328] AH00422: Parent: Received shutdown signal – Shutting down the server.
[Thu Dec 27 16:21:41.149112 2018] [mpm_winnt:notice] [pid 8600:tid 248] AH00364: Child: All worker threads have exited.
[Thu Dec 27 16:21:49.503947 2018] [fcgid:error] [pid 8600:tid 228] FastCGI process 8784 still did not exit, terminating forcefully
[Thu Dec 27 16:21:49.503947 2018] [fcgid:error] [pid 8600:tid 228] FastCGI process 7800 still did not exit, terminating forcefully
[Thu Dec 27 16:21:50.507048 2018] [mpm_winnt:notice] [pid 7008:tid 328] AH00430: Parent: Child process exited successfully.
[Thu Dec 27 16:21:51.461143 2018] [mpm_winnt:notice] [pid 8780:tid 328] AH00455: Apache/2.4.3 (Win32) mod_fcgid/2.3.7 configured – resuming normal operations
[Thu Dec 27 16:21:51.463143 2018] [mpm_winnt:notice] [pid 8780:tid 328] AH00456: Server built: Aug 20 2012 14:21:37
[Thu Dec 27 16:21:51.463143 2018] [core:notice] [pid 8780:tid 328] AH00094: Command line: ‘C:\Program Files (x86)\NetMake\v71\COMPON~1\apache\bin\httpd.exe -d C:/Program Files (x86)/NetMake/v71/components/apache’
[Thu Dec 27 16:21:51.465143 2018] [mpm_winnt:notice] [pid 8780:tid 328] AH00418: Parent: Created child process 1628
[Thu Dec 27 16:21:51.880185 2018] [mpm_winnt:notice] [pid 1628:tid 248] AH00354: Child: Starting 64 worker threads.
[Thu Dec 27 16:24:16.869682 2018] [mpm_winnt:notice] [pid 8780:tid 328] AH00422: Parent: Received shutdown signal – Shutting down the server.
[Thu Dec 27 16:24:45.075503 2018] [mpm_winnt:notice] [pid 1628:tid 248] AH00364: Child: All worker threads have exited.
[Thu Dec 27 16:24:46.872682 2018] [mpm_winnt:notice] [pid 8780:tid 328] AH00431: Parent: Forcing termination of child process 160
[Thu Dec 27 16:24:58.070802 2018] [mpm_winnt:notice] [pid 2064:tid 328] AH00455: Apache/2.4.3 (Win32) mod_fcgid/2.3.7 configured – resuming normal operations
[Thu Dec 27 16:24:58.072802 2018] [mpm_winnt:notice] [pid 2064:tid 328] AH00456: Server built: Aug 20 2012 14:21:37
[Thu Dec 27 16:24:58.072802 2018] [core:notice] [pid 2064:tid 328] AH00094: Command line: ‘C:\Program Files (x86)\NetMake\v71\COMPON~1\apache\bin\httpd.exe -d C:/Program Files (x86)/NetMake/v71/components/apache’
[Thu Dec 27 16:24:58.074803 2018] [mpm_winnt:notice] [pid 2064:tid 328] AH00418: Parent: Created child process 7736
[Thu Dec 27 16:24:58.506846 2018] [mpm_winnt:notice] [pid 7736:tid 248] AH00354: Child: Starting 64 worker threads.
[Thu Dec 27 16:35:22.568246 2018] [fcgid:warn] [pid 7736:tid 228] mod_fcgid: process 5688 graceful kill fail, sending SIGKILL
[Thu Dec 27 16:35:22.568246 2018] [fcgid:warn] [pid 7736:tid 228] mod_fcgid: process 8336 graceful kill fail, sending SIGKILL
[Thu Dec 27 16:35:22.568246 2018] [fcgid:warn] [pid 7736:tid 228] mod_fcgid: process 7748 graceful kill fail, sending SIGKILL
[Thu Dec 27 16:35:22.568246 2018] [fcgid:warn] [pid 7736:tid 228] mod_fcgid: process 4860 graceful kill fail, sending SIGKILL

certo da atenção de vocês, obrigado e no aguardo.