├── .github
    └── FUNDING.yml
├── README.md
├── LICENSE
└── php-fpm-tuner.php


/.github/FUNDING.yml:
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1 | # These are supported funding model platforms
2 | 
3 | github: samdark
4 | patreon: samdark


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/README.md:
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 1 | # PHP-FPM tuner
 2 | 
 3 | Simple script that helps tuning PHP-FPM.
 4 | 
 5 | ```
 6 | ❯ php php-fpm-tuner.php
 7 | 
 8 | pm.max_children = 11
 9 | start_servers = 3
10 | min_spare_servers = 3
11 | max_spare_servers = 8
12 | ```
13 | 
14 | The script calculates `pm.max_children` based on available free memory and memory used for each worker (it is either determined from currently running workers or php.ini memory limit). `start_servers`, `min_spare_servers`, and `max_spare_servers` are taking both memory limits and CPU cores available into account.
15 | 


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/LICENSE:
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 1 | Copyright (c) 2015, Alexander Makarov
 2 | All rights reserved.
 3 | 
 4 | Redistribution and use in source and binary forms, with or without
 5 | modification, are permitted provided that the following conditions are met:
 6 | 
 7 | * Redistributions of source code must retain the above copyright notice, this
 8 |   list of conditions and the following disclaimer.
 9 | 
10 | * Redistributions in binary form must reproduce the above copyright notice,
11 |   this list of conditions and the following disclaimer in the documentation
12 |   and/or other materials provided with the distribution.
13 | 
14 | * Neither the name of realpath_cache_tuner nor the names of its
15 |   contributors may be used to endorse or promote products derived from
16 |   this software without specific prior written permission.
17 | 
18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
22 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 | OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 | 


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/php-fpm-tuner.php:
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 1 | <?php
 2 | 
 3 | function getCpuCores() {
 4 |     if (PHP_OS_FAMILY == 'Windows') {
 5 |         $cores = shell_exec('echo %NUMBER_OF_PROCESSORS%');
 6 |     } else {
 7 |         $cores = shell_exec('nproc');
 8 |     }
 9 | 
10 |     return (int) $cores;
11 | }
12 | 
13 | function getFreeMemory() {
14 |     if (PHP_OS_FAMILY == 'Windows' && preg_match('~(\d+)~', shell_exec('wmic OS get FreePhysicalMemory'), $matches)) {
15 |         $freeMemory = round((int) $matches[1] / 1024);
16 |     } else {
17 |         if (preg_match('~MemFree:\s+(\d+)\s+~', shell_exec('cat /proc/meminfo'), $matches)) {
18 |             $freeMemory = $matches[1] / 1024;
19 |         }
20 |     }
21 |     return (int) $freeMemory;
22 | }
23 | 
24 | function getWorkerMemory() {
25 |     if (PHP_OS_FAMILY !== 'Windows' && preg_match_all('~(\d+).*php-fpm: pool~', shell_exec('ps -eo size,command'), $matches, PREG_PATTERN_ORDER)) {
26 |         $processMemory = round(array_sum($matches[1]) / count($matches[1]) / 1024);
27 |     }
28 |     
29 |     if (!isset($processMemory)) {
30 |        $processMemory = round(ini_parse_quantity(ini_get('memory_limit')) / 1048576);
31 |     }
32 | 
33 |     return (int) $processMemory;
34 | }
35 | 
36 | $cpuCores = getCpuCores();
37 | $freeMemory = getFreeMemory();
38 | $workerMemory = getWorkerMemory();
39 | 
40 | // reserve 10% for system use
41 | $memoryReserve = round(0.1 * $freeMemory);
42 | 
43 | $maxChildren = floor(($freeMemory - $memoryReserve) / $workerMemory);
44 | 
45 | echo "pm.max_children = " . $maxChildren . "\n";
46 | echo "pm.start_servers = " . min(round(0.25 * $maxChildren), $cpuCores * 4) . "\n";
47 | echo "pm.min_spare_servers = " . min(round(0.25 * $maxChildren), $cpuCores * 2) . "\n";
48 | echo "pm.max_spare_servers = " . min(round(0.75 * $maxChildren), $cpuCores * 4) . "\n";
49 | 


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