Hi,
its new installation ubuntu 20.04
my websites work fine but seeing lot of errors in error log
[Wed Mar 23 08:31:51.492118 2022] [mpm_event:notice] [pid 920:tid 140615805967424] AH00493: SIGUSR1 received. Doing graceful restart
[Wed Mar 23 08:31:51.520879 2022] [ssl:warn] [pid 920:tid 140615805967424] AH01873: Init: Session Cache is not configured [hint: SSLSessionCache]
[Wed Mar 23 08:31:51.528072 2022] [lbmethod_heartbeat:notice] [pid 920:tid 140615805967424] AH02282: No slotmem from mod_heartmonitor
[Wed Mar 23 08:31:51.528241 2022] [mpm_event:notice] [pid 920:tid 140615805967424] AH00489: Apache/2.4.52 (Unix) OpenSSL/1.1.1f configured -- resuming normal operations
[Wed Mar 23 08:31:51.528248 2022] [core:notice] [pid 920:tid 140615805967424] AH00094: Command line: '/www/server/apache/bin/httpd'
