Thank's for your comments Frank,
Reading the Apache documentation
(https://httpd.apache.org/docs/2.4/en/mod/mpm_common.html#threadlimit)
I cannot find the way to calculate an optimal value for ThreadLimit
and ThreadsPerChild directives for that reason I kept the default
values (64 and 25).
Can you (or anyone) help me to find the right values?
Missatge de Frank Gingras <thumbs@xxxxxxxxxx> del dia dj., 17 de març
2022 a les 17:19:
>
> Those settings could fit your workload, or not. You need to measure it with /server-status to see how many idle workers you have.
>
> That being said, ThreadsPerChild seems very low. Depending on your content, you could likely ramp up to a much higher value, which means that you would need less parent processes.
>
>
>
> On Wed, 16 Mar 2022 at 08:14, Marc Serra <mserra@xxxxxxxxx> wrote:
>>
>> I'm sorry to insist ... if this list is not the right place to ask that question, could anyone tell me where to do it?
>>
>> Thank's
>>
>> Missatge de Marc Serra <mserra@xxxxxxxxx> del dia dc., 9 de març 2022 a les 18:01:
>>>
>>> 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.
>>>
>>
>>
>> --
>> Marc Serra
>> Organització i Sistemes
>>
>>
>> Manxa 1876, S.L.
>> Ctra. Les Tries, 85.17800 Olot (Girona)
>> Tel. 972 27 45 30 www.manxa.com Manxa Industrial
>> Manxa Ferros
>> Manxa Ferreteria i Parament de la Llar
>>
>> El contingut d’aquest correu electrònic i els seus annexos és estrictament confidencial. En el cas que no siguis el destinatari i hagis rebut aquest missatge per error, preguem que ho comuniquis al remitent i procedeixis a la seva eliminació, sense difondre, emmagatzemar o copiar el seu contingut. Imprimeix aquest correu només si és necessari.
>>
>> El contenido de este correo electrónico y sus anexos es estrictamente confidencial. En el caso de que no seas el destinatario y hayas recibido este mensaje por error, rogamos lo comuniques al remitente y procedas a su eliminación, sin difundir, almacenar o copiar su contenido. Imprimir este correo solo si es necesario.
>>
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>>
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--
Marc Serra
--
<https://www.manxa.com>
Manxa 1876, S.L.
Ctra. Les
Tries, 85.17800 Olot (Girona)
*Tel. 972 27 45 30 www.manxa.com
<https://www.manxa.com>*
<https://www.manxaindustrial.com> *Manxa
Industrial <https://www.manxaindustrial.com>*
<https://www.manxaferros.com> *Manxa Ferros <https://www.manxaferros.com>*
<https://www.manxabricolatge.com> *Manxa Ferreteria i Parament de la Llar
<https://www.manxabricolatge.com>*
--
El contingut d’aquest correu electrònic i els seus annexos és
estrictament confidencial. En el cas que no siguis el destinatari i hagis
rebut aquest missatge per error, preguem que ho comuniquis al remitent i
procedeixis a la seva eliminació, sense difondre, emmagatzemar o copiar el
seu contingut. Imprimeix aquest correu només si és necessari.
El contenido
de este correo electrónico y sus anexos es estrictamente confidencial. En
el caso de que no seas el destinatario y hayas recibido este mensaje por
error, rogamos lo comuniques al remitente y procedas a su eliminación, sin
difundir, almacenar o copiar su contenido. Imprimir este correo solo si es
necesario.
The content of this email and its attachments is strictly
confidential. If you are not the recipient and you have received this
message by mistake, please notify the sender and proceed to its
elimination, without spreading, storing or copying its content. Print this
email only if necessary.
Le contenu de cet e-mail et de ses pièces jointes
est strictement confidentiel. Dans le cas où vous n'êtes pas le
destinataire et avez reçu ce message par erreur, veuillez en informer
l'expéditeur et procéder à sa suppression, sans diffuser, stocker ou copier
son contenu. Imprimez cet e-mail uniquement si nécessaire.
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