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# System Requirements

## Memory

Memory requirements for running an Nextcloud server are greatly variable, depending on the numbers of users and files, and volume of server activity. Nextcloud needs a minimum of 128MB RAM, and we recommend a minimum of 512MB.

## Recommended Setup for Running Nextcloud

For best performance, stability, support, and full functionality we recommend:

- Red Hat Enterprise Linux 7 / Ubuntu 16.04 LTS
- MySQL/MariaDB
- PHP 7.0, 7.1 (PHP 7.2 not supported)
- Apache 2.4 with mod_php

## Supported Platforms

- Server: Linux (Debian 7, SUSE Linux Enterprise Server 11 SP3 & 12, Red Hat Enterprise Linux/CentOS 6.5 and 7 (7 is 64-bit only), Ubuntu 14.04 LTS, 16.04 LTS)
- Web server: Apache 2 (mod_php, php-fpm) or Nginx (php-fpm)
- Databases: MySQL/MariaDB 5.5+; PostgreSQL 9.x (10 is supported with Nextcloud 13+); Oracle 11g (currently only possible if you contact us <https://nextcloud.com/enterprise> as part of a subscription)
- PHP 5.6 + required (PHP 7.2 not supported)
- Hypervisors: Hyper-V, VMware ESX, Xen, KVM
- Desktop: Windows XP SP3 (EoL Q2 2015), Windows 7+, macOS 10.10+ (64-bit only), Linux (CentOS 6.5, 7 (7 is 64-bit only), Ubuntu 12.04 LTS, 14.04 LTS, 14.10, Fedora 20, 21, openSUSE 12.3, 13, Debian 7 & 8).
- Mobile apps: iOS 7+, Android 4+
- Web browser: IE11+, Microsoft Edge, Firefox 14+, Chrome 18+, Safari 7+

See Installation on Linux for minimum software versions for installing Nextcloud.

## Database Requirements for MySQL / MariaDB

The following is currently required if you’re running Nextcloud together with a MySQL / MariaDB database:

- InnoDB storage engine (MyISAM is not supported)
- “READ COMMITED” transaction isolation level (See: Database “READ COMMITED” transaction isolation level)
- Disabled or BINLOG_FORMAT = ROW configured Binary Logging (See: https://dev.mysql.com/doc/refman/5.7/en/binary-log-formats.html)

### Emoji (UTF8 4-byte) support with MySQL / MariaDB

If you want to use UTF8 4-byte characters such as Emojis on your server, the database needs to be created with character set `utf8mb4` and collate `utf8mb4_general_ci`, e.g.:

    CREATE DATABASE nextcloud CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

Additionally the following InnoDB settings need to be set:

    [mysqld]
    innodb_large_prefix=on
    innodb_file_format=barracuda
    innodb_file_per_table=true

See Enabling MySQL 4-byte support for more information.

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