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--- os_nextcloud [2025/03/18 01:35] – [Optimized PHP Configuration] Júne Park
+++ os_nextcloud [2025/04/14 08:48] (current) – [Edit - Panel] Júne Park
@@ Line 1: / Line 1: @@
 ====== Nextcloud™ ======
 ----
+===== Required packages =====
+<code bash>
+sudo apt install php8.x php8.x-common php8.x-gmp php8.x-mbstring php8.x-readline php8.x-xmlrpc php8.x-bcmath php8.x-curl php8.x-igbinary php8.x-mcrypt php8.x-redis php8.x-zip php8.x-bz2 php8.x-fpm php8.x-imagick php8.x-mysql php8.x-soap php8.x-cli php8.x-gd php8.x-intl php8.x-opcache php8.x-xml
+</code>
+----
 ==== Optimized PHP Configuration ====
@@ Line 68: / Line 75: @@
 opcache.jit = tracing
 ; "tracing" mode offers the best performance for web apps like Nextcloud.
-<code>
+</code>
 ----
+=== Enable JIT in Opcache ===
+Edit ''/etc/php/8.x/fpm/conf.d/10-opcache.ini''
+<code php>
+; configuration for php opcache module
+; priority=10
+zend_extension=opcache.so
+opcache.enable_cli=1
+opcache.jit_buffer_size=100M
+opcache.jit=tracing
+</code>
+Check JIT is enabled
+<code bash>
+sudo php -i | grep -q 'opcache.jit_buffer_size => [^0]' && echo "JIT is enabled" || echo "JIT is disabled"
+</code>
+----
+==== Optimized PHP-FPM Configuration ====
+PHP-FPM settings are typically in a pool configuration file like ''/etc/php/8.1/fpm/pool.d/www.conf''. The default settings are often too conservative for Nextcloud, leading to slow response times or errors under load.
+=== Process Manager Settings ===
+<code ini>
+pm = dynamic
+; "dynamic" adjusts the number of child processes based on load; use "static" for dedicated servers with predictable traffic.
+pm.max_children = 120
+; Max number of child processes; calculate as (Total RAM - 1G for OS/other services) / 50-100 MB per process.
+; Example: 4 GB RAM → ~60-80 children; 8 GB RAM → ~120-150 children.
+pm.start_servers = 12
+; Initial processes; set to ~10-20% of max_children.
+pm.min_spare_servers = 6
+; Minimum idle processes; set to ~5-10% of max_children.
+pm.max_spare_servers = 18
+; Maximum idle processes; set to ~15-25% of max_children.
+pm.max_requests = 500
+; Restart child processes after this many requests to prevent memory leaks.
+</code>
+----
+=== Tuning Tips ===
+  * Memory Usage: Each PHP-FPM process may use 50-100 MB of RAM, depending on loaded extensions and workload. Monitor with ''htop'' or ''ps'' and adjust ''max_children'' to avoid swapping.
+  * CPU Cores: Ensure ''start_servers'' + ''min_spare_servers'' doesn’t exceed your CPU core count to avoid contention.
+  * Static vs. Dynamic: Use ''pm = static'' with ''max_children'' set to a fixed number (e.g., 20-40) if your server is dedicated to Nextcloud and traffic is consistent.
+----
+=== Additional PHP-FPM Settings ===
+Edit ''/etc/php/8.1/fpm/pool.d/www.conf''
+<accordion>
+<code ini>
+request_terminate_timeout = 300
+; Match max_execution_time to handle long uploads gracefully.
+process.priority = -19
+; Optional: Boost priority (requires root and SYS_NICE capability).
+</code>
+----
+Optimal configuration for ''/etc/php/8.2/fpm/conf.d/10-opcache.ini ''
+<panel title="Optimal configuration for 10-opcache.ini">
+<code ini>
+; configuration for php opcache module
+; priority=10
+opcache.enable = 1
+; Enable OPcache.
+opcache.memory_consumption = 128
+; Memory for cached scripts (128 MB is a good starting point; increase to 256 MB if RAM allows).
+opcache.interned_strings_buffer = 8
+; Memory for string interning (8 MB is sufficient for most cases).
+opcache.max_accelerated_files = 10000
+; Max number of files to cache; adjust based on Nextcloud’s file count.
+opcache.revalidate_freq = 60
+; How often to check for file changes (60 seconds balances performance and freshness).
+opcache.save_comments = 1
+; Required by Nextcloud to preserve code comments in bytecode.
+zend_extension=opcache.so
+opcache.enable_cli = 1
+; Disable for CLI to avoid unnecessary overhead in cron jobs.
+;
+opcache.jit_buffer_size = 100M
+opcache.jit = tracing
+; "tracing" mode offers the best performance for web apps like Nextcloud.
+;
+opcache.interned_strings_buffer = 16
+opcache.memory_consumption = 256
+</code>
+</panel>
+</accordion>
+----
+==== Nextcloud-Specific Tweaks ====
+{{mdi>information-variant?24&color=#be0027}} [[https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/caching_configuration.html|Referral manuals]] --- by Nextcloud Documentation
+  * Memory Caching: Use Redis for local and file-locking caches to reduce database load. Edit ''/var/www/nextcloud/config/config.php'':
+  <code php>
+'memcache.local' => '\OC\Memcache\Redis',
+'memcache.locking' => '\OC\Memcache\Redis',
+'redis' => [
+    'host' => 'localhost',
+    'port' => 6379,
+],
+  </code>
+  <code php>
+  <?php
+$CONFIG = array (
+... ... ...
+...
+),
+'memcache.local' => '\\OC\\Memcache\\Redis',
+'filelocking.enabled' => 'true',
+'memcache.distributed' => '\\OC\\Memcache\\Redis',
+'memcache.locking' => '\\OC\\Memcache\\Redis',
+'redis' =>
+array (
+'host' => 'localhost',
+'port' => 6379,
+'timeout' => 0,
+'dbindex' => 0,
+),
+);
+</code>
+Install Redis (sudo apt install redis-server on Debian) and ensure it’s running.
+<code bash>
+sudo apt install redis-server php-redis
+</code>
+<code bash>
+sudo ps ax | grep redis
+sudo netstat -tlnp | grep redis
+</code>
+Clearing Redis Cache
+<code bash>
+sudo redis-cli
+  SELECT <dbIndex>
+  FLUSHDB
+</code>
+  * Cron Jobs: Use a system cron job instead of AJAX for background tasks. Add to ''/etc/crontab'':
+<code bash>
+*/5 * * * * www-data php -f /var/www/nextcloud/cron.php
+</code>
+  * Database: Use MySQL/MariaDB with InnoDB, and tune its configuration (e.g., ''innodb_buffer_pool_size = 1G'' for 4 GB RAM).
+----
+==== Validation ====
+  * Check PHP settings: Create a phpinfo.php file with <?php phpinfo(); and access it via your browser.
+  * Monitor performance: Use top, htop, or Nextcloud’s admin overview for warnings.
+  * Test responsiveness: Upload large files and navigate the web interface under load.
+----
+==== Scaling Adjustments ====
+  * Low-End Servers (e.g., Raspberry Pi, 2 GB RAM): Reduce ''max_children'' to 10-20, ''memory_limit'' to 256M, and skip JIT.
+  * High-Traffic Servers (e.g., 16+ GB RAM): Increase ''max_children'' to 200+, ''memory_limit'' to 1-2G, and use Redis with multiple instances if needed.
+This configuration provides a solid starting point for Nextcloud, balancing performance and resource efficiency. Fine-tune based on your server’s actual usage patterns and hardware capabilities.
+----
+===== Alter datadirectory after installation =====
+<code ini>
+ncdir='/path/to/nextcloud'
+olddata='/old/path/to/data'
+newdata='/new/path/to/data'
+</code>
+Turn maintenance mode on
+<code bash>
+sudo -u www-data php "$ncdir/occ" maintenance:mode --on
+</code>
+Move / Copy datadirectory for your purpose.
+Change ''datadirectory'' value in ''.../config/config.php''
+<code bash>
+sudo sed -i "s|$olddata|$newdata|" "$ncdir/config/config.php"
+</code>
+Before change database dataset, backup database for your safety.
+Adjust ''oc_storages'' database table to reflect the new data folder location.
+<code mysql>
+mysql -u"$dbuser" -p"$dbpass" -e "update $dbname.oc_storages set id='local::$newdata/' where id='local::$olddata/';"
+</code>
+----
 ===== Solved Problems =====
-=== mjs configuration error ===
+==== mjs configuration error ====
 == Error description ==
@@ Line 96: / Line 335: @@
 #    }
 </code>
+----
+==== PHP imagick module ====
+== Error description ==
+<text type="danger">The PHP module “imagick” in this instance has no SVG support</text>
+== Solution ==
+Install php-imagick moduel with associated packages
+<code bash>
+sudo apt install php-imagick imagemagick
+</code>
+----
+==== Incorrect row format found ====
+== Error description ==
+<text type="danger">Incorrect row format found in your database. ROW_FORMAT=Dynamic offers the best database performances for Nextcloud. Please update row format on the following list: ... </text>
+== Solution ==
+Create the script and run with root permission with following:
+<code bash>
+#!/bin/bash
+# Prompt for database credentials
+read -p "Enter Database Name: " DB_NAME
+read -p "Enter Username: " DB_USER
+read -s -p "Enter Password: " DB_PASS
+echo
+# Execute all ALTER TABLE statements in one query
+mysql -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" -Bse "
+SELECT CONCAT('ALTER TABLE \`', TABLE_NAME, '\` ROW_FORMAT=DYNAMIC;')
+FROM INFORMATION_SCHEMA.TABLES
+WHERE TABLE_SCHEMA = '$DB_NAME'
+AND ENGINE = 'InnoDB'
+" | mysql -u "$DB_USER" -p"$DB_PASS" "$DB_NAME"
+</code>
+----