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httpd processes are too many created from Apache 2.2.31 on Linux Server.

Hello.

I'm using Apache 2.2.31 on Linux Server.

I've faced an issue that Memory Utilization is over 80% on Linux Server.

When I checked /var/log/messages on Linux Server, I found out that httpd
processes were too many created on Linux server.

Jan 6 18:39:00 <server name> kernel: [621588.393289] Out of memory: Kill
process 4577 (httpd) score 16 or sacrifice child
Jan 6 18:39:00 <server name> kernel: [621588.402442] Killed process 4577
(httpd) total-vm:709776kB, anon-rss:124196kB, file-rss:0kB

When I checked Apache error logs, I found out below errors from Apache
error logs at the same ti