httpd memory usage

[Paul Gregory <paulg@xxxxxxxxxxxxxxxxxx>]

    Hello,
    httpd is eating my server memory.   12GB of installed memory.
    I've read a lot of info on memory tuning, but can't seem to make it
    use less than shown below.
    
    Thanks for any and all help,
    Paul
    
      PID USER      PR 
      NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
      15890 apache    20   0 4291252   1.6g  10544 S   0.0 14.1  
      4:45.03 httpd
      15891 apache    20   0 4383160   1.5g  10640 S   0.0 14.0  
      5:32.65 httpd
      15756 apache    20   0 4156040   1.4g  10260 S   0.0 12.7  
      2:26.57 httpd
      15730 apache    20   0 3697448 980.4m   9888 S   0.0  8.7  
      1:07.23 httpd
      15729 apache    20   0 3229884 810576   6928 S   0.0  7.0  
      0:50.16 httpd
    
    Server info:
    # ./apachectl -V
      Server version: Apache/2.4.53 (Unix)
      Server built:   Apr  3 2022 08:22:55
      Server's Module Magic Number: 20120211:124
      Server loaded:  APR 1.7.0, APR-UTIL 1.6.1, PCRE 8.32 2012-11-30
      Compiled using: APR 1.7.0, APR-UTIL 1.6.1, PCRE 8.32 2012-11-30
      Architecture:   64-bit
      Server MPM:     event
        threaded:     yes (fixed thread count)
          forked:     yes (variable process count)
      Server compiled with....
       -D APR_HAS_SENDFILE
       -D APR_HAS_MMAP
       -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
       -D APR_USE_PROC_PTHREAD_SERIALIZE
       -D APR_USE_PTHREAD_SERIALIZE
       -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
       -D APR_HAS_OTHER_CHILD
       -D AP_HAVE_RELIABLE_PIPED_LOGS
       -D DYNAMIC_MODULE_LIMIT=256
       -D HTTPD_ROOT="/usr/local/apache-2.4.53"
       -D SUEXEC_BIN="/usr/local/apache-2.4.53/bin/suexec"
       -D DEFAULT_PIDLOG="logs/httpd.pid"
       -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
       -D DEFAULT_ERRORLOG="logs/error_log"
       -D AP_TYPES_CONFIG_FILE="conf/mime.types"
       -D SERVER_CONFIG_FILE="conf/httpd.conf"
    
    MPM event settings:
    <IfModule
      mpm_event_module>
          StartServers             5
          MinSpareThreads         50
          MaxSpareThreads        150
          ThreadsPerChild         25
          MaxRequestWorkers      200
          MaxConnectionsPerChild 1000
      </IfModule>