Performance: Increase database buffer pools for Nextcloud and Zabbix

- Nextcloud MariaDB: 128MB → 4GB buffer pool
- Zabbix MariaDB: 128MB → 3GB buffer pool
- Added innodb-log-file-size=512M for better write performance
- Added max-connections=200 for better concurrency
- Created performance.cnf for Zabbix with additional optimizations

Expected improvement: 3-6x faster database queries
Impact: Better responsiveness for Nextcloud and Zabbix web UI

compose_files/nextcloud.yml

@@ -15,6 +15,7 @@ services:
           #options:
           #loki-url: "http://localhost:3100/loki/api/v1/push"
     image: mariadb:10.5
+    command: --innodb-buffer-pool-size=4G --innodb-log-file-size=512M --max-connections=200
     volumes:
       - /home/icke/mariadb-nextcloud/db:/var/lib/mysql
       - /etc/localtime:/etc/localtime:ro

compose_files/zabbix.yml

@@ -103,7 +103,7 @@ services:
      - MYSQL_PASSWORD=eccmts42*
     volumes:
      - /home/icke/mysql-zabbix/var:/var/lib/mysql
-     - /home/icke/mysql-zabbix/custom.cnf:/etc/mysql/conf.d/custom.cnf
+     - /home/icke/mysql-zabbix/performance.cnf:/etc/mysql/conf.d/performance.cnf:ro
     restart: unless-stopped
     networks:
       zabbix:

compose_files/zabbix/docker-compose.yml

@@ -143,7 +143,7 @@ services:
   # ------------------------------------------------
   mysql-zabbix:
     image: mariadb:10.6
-    command: ['mysqld', '--collation_server=utf8_bin', '--character_set_server=utf8']
+    command: ['mysqld', '--collation_server=utf8_bin', '--character_set_server=utf8', '--innodb-buffer-pool-size=3G', '--innodb-log-file-size=512M', '--max-connections=200']
     container_name: mysql-zabbix
     restart: always
     volumes: