Prerequisites and Overview


The only prerequisite for running SonarQube is to have Java (Oracle JRE 11 or OpenJDK 11) installed on your machine.

Hardware Requirements

  1. A small-scale (individual or small team) instance of the SonarQube server requires at least 2GB of RAM to run efficiently and 1GB of free RAM for the OS. If you are installing an instance for a large teams or Enterprise, please consider the additional recommendations below.
  2. The amount of disk space you need will depend on how much code you analyze with SonarQube.
  3. SonarQube must be installed on hard drives that have excellent read & write performance. Most importantly, the "data" folder houses the Elasticsearch indices on which a huge amount of I/O will be done when the server is up and running. Great read & write hard drive performance will therefore have a great impact on the overall SonarQube server performance.
  4. SonarQube does not support 32-bit systems on the server side. SonarQube does, however, support 32-bit systems on the scanner side.

Enterprise Hardware Recommendations

For large teams or Enterprise-scale installations of SonarQube, additional hardware is required. At the Enterprise level, monitoring your SonarQube instance is essential and should guide further hardware upgrades as your instance grows. A starting configuration should include at least:

  • 8 cores, to allow the main SonarQube platform to run with multiple Compute Engine workers
  • 16GB of RAM For additional requirements and recommendations relating to database and ElasticSearch, see Hardware Recommendations.

Supported Platforms


SonarQube scanners require version 8 or 11 of the JVM and the SonarQube server requires version 11. Versions beyond Java 11 are not officially supported.

SonarQube is able to analyze any kind of Java source files regardless of the version of Java they comply to.

We recommend using the Critical Patch Update (CPU) releases.

Oracle JRE 11 11
8 8
OpenJDK 11 11
8 8
PostgreSQL 13
Must be configured to use UTF-8 charset
Microsoft SQL Server 2019 (MSSQL Server 15.0) with bundled Microsoft JDBC driver. Express Edition is supported.
2017 (MSSQL Server 14.0) with bundled Microsoft JDBC driver. Express Edition is supported.
2016 (MSSQL Server 13.0) with bundled Microsoft JDBC driver. Express Edition is supported.
2014 (MSSQL Server 12.0) with bundled Microsoft JDBC driver. Express Edition is supported.
Collation must be case-sensitive (CS) and accent-sensitive (AS) (example: Latin1_General_CS_AS)
READ_COMMITTED_SNAPSHOT must be set on the SonarQube database to avoid potential deadlocks under heavy load
Both Windows authentication (“Integrated Security”) and SQL Server authentication are supported. See the Microsoft SQL Server section in Installing/installation/installing-the-server page for instructions on configuring authentication.
Oracle 19C
XE Editions
Must be configured to use a UTF8-family charset (see NLS_CHARACTERSET)
The driver ojdbc14.jar is not supported
We recommend using the latest Oracle JDBC driver
Only the thin mode is supported, not OCI
Only MAX_STRING_SIZE=STANDARD parameter is supported, not EXTENDED

Web Browser

To get the full experience SonarQube has to offer, you must enable JavaScript in your browser.

Microsoft Internet Explorer IE 11
Microsoft Edge Latest
Mozilla Firefox Latest
Google Chrome Latest
Opera Not tested
Safari Latest

Platform notes


If you're running on Linux, you must ensure that:

  • vm.max_map_count is greater than or equal to 524288
  • fs.file-max is greater than or equal to 131072
  • the user running SonarQube can open at least 131072 file descriptors
  • the user running SonarQube can open at least 8192 threads

You can see the values with the following commands:

sysctl vm.max_map_count
sysctl fs.file-max
ulimit -n
ulimit -u

You can set them dynamically for the current session by running the following commands as root:

sysctl -w vm.max_map_count=524288
sysctl -w fs.file-max=131072
ulimit -n 131072
ulimit -u 8192

To set these values more permanently, you must update either /etc/sysctl.d/99-sonarqube.conf (or /etc/sysctl.conf as you wish) to reflect these values.

If the user running SonarQube (sonarqube in this example) does not have the permission to have at least 131072 open descriptors, you must insert this line in /etc/security/limits.d/99-sonarqube.conf (or /etc/security/limits.conf as you wish):

sonarqube   -   nofile   131072
sonarqube   -   nproc    8192

If you are using systemd to start SonarQube, you must specify those limits inside your unit file in the section [service] :


seccomp filter

By default, Elasticsearch uses seccomp filter. On most distribution this feature is activated in the kernel, however on distributions like Red Hat Linux 6 this feature is deactivated. If you are using a distribution without this feature and you cannot upgrade to a newer version with seccomp activated, you have to explicitly deactivate this security layer by updating in $SONARQUBEHOME/conf/sonar.properties_:

You can check if seccomp is available on your kernel with:

$ grep SECCOMP /boot/config-$(uname -r)

If your kernel has seccomp, you will see:


For more detail, see the Elasticsearch documentation.


Generating Executive Reports requires that fonts be installed on the server hosting SonarQube. On Windows servers, this is a given. However, this is not always the case for Linux servers.

The following should be ensured:

  • Fontconfig is installed on the server hosting SonarQube
  • A package of FreeType fonts is installed on the SonarQube server. The exact packages available will vary by distribution, but a commonly used package is libfreetype6