Hi, I want to configure an apache server to support a high load site. Are
these settings correct?
/etc/apache2/mods-enabled/mpm_event.conf
<IfModule mpm_event_module>
StartServers 2
MinSpareThreads 75
MaxSpareThreads 250
ThreadLimit 64
ThreadsPerChild 25
MaxRequestWorkers 1500
MaxConnectionsPerChild 0
ServerLimit 75
</IfModule>
I used a combination of
https://httpd.apache.org/docs/2.4/en/mod/mpm_common.html and
https://support.plesk.com/hc/en-us/articles/214529205-Apache-keeps-going-down-on-a-Plesk-server-server-reached-MaxRequestWorkers-setting
...
MaxRequestWorkers = (Total RAM - Memory used for Linux, DB, etc.) / average
Apache process size
=>
1500 = (64000 - 60000) / 40
The default ServerLimit value is 16. To increase it, you must also raise
MaxRequestWorkers using the following formula: ServerLimit value x 25 =
MaxRequestWorkers value. For example, if ServerLimit is set to 20, then
MaxRequestWorkers will be 20 x 25 = 500.
=>
75 x 25 = 1500
The hardware includes 64GB of memory, AMD Ryzen 7 PRO 3700 8-Core Processor
and NVME disks.
I'm using Apache 2.4.41 with event MPM on ubuntu 20.04 ...
Server version: Apache/2.4.41 (Ubuntu)
Server built: 2022-01-05T14:49:56
Server's Module Magic Number: 20120211:88
Server loaded: APR 1.6.5, APR-UTIL 1.6.1
Compiled using: APR 1.6.5, APR-UTIL 1.6.1
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_SYSVSEM_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="/etc/apache2"
-D SUEXEC_BIN="/usr/lib/apache2/suexec"
-D DEFAULT_PIDLOG="/var/run/apache2.pid"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="mime.types"
-D SERVER_CONFIG_FILE="apache2.conf"
And this loaded Modules...
core_module (static)
so_module (static)
watchdog_module (static)
http_module (static)
log_config_module (static)
logio_module (static)
version_module (static)
unixd_module (static)
access_compat_module (shared)
aclr_module (shared)
actions_module (shared)
alias_module (shared)
auth_basic_module (shared)
authn_core_module (shared)
authn_file_module (shared)
authz_core_module (shared)
authz_host_module (shared)
authz_user_module (shared)
autoindex_module (shared)
cgid_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
fcgid_module (shared)
filter_module (shared)
headers_module (shared)
include_module (shared)
mime_module (shared)
mpm_event_module (shared)
negotiation_module (shared)
proxy_module (shared)
proxy_fcgi_module (shared)
proxy_http_module (shared)
proxy_wstunnel_module (shared)
remoteip_module (shared)
reqtimeout_module (shared)
rewrite_module (shared)
setenvif_module (shared)
socache_shmcb_module (shared)
ssl_module (shared)
status_module (shared)
suexec_module (shared)
unique_id_module (shared)
userdir_module (shared)
Thank's for your time.
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