Snow Owl Docs
7.x
7.x
  • README
  • Getting started
    • Basic Concepts
    • Installation
    • Explore Snow Owl
      • Check Health
      • List available Code Systems
      • SNOMED CT
      • Import RF2 distribution
      • Search SNOMED CT
      • Create a Concept
      • Version SNOMED CT
      • Export SNOMED CT
    • Conclusion
  • Set up Snow Owl
    • Installing Snow Owl
      • Installing Snow Owl with .zip or .tar.gz
      • Installing Snow Owl with RPM
      • Installing Snow Owl with Debian Package
      • Installing Snow Owl with Docker
    • Configuring Snow Owl
      • Setting JVM options
      • Logging configuration
      • Elasticsearch configuration
    • Important Snow Owl configuration
    • Important System configuration
      • Disable swapping
      • File descriptors
      • Virtual memory
      • Number of threads
      • Tweaking for performance
    • Starting Snow Owl
    • Stopping Snow Owl
    • Configuring security
      • Configuring a file realm
      • Configuring an LDAP realm
    • Configuring monitoring
    • Configuration reference
  • Extension Management
    • Extensions and Snow Owl
    • Scenarios
      • Single Edition
      • Single Extension Authoring
      • Multi Extension Authoring
    • Development
    • Releases
    • Upgrading
    • Integrations
  • API
    • Core API
    • SNOMED CT API
      • Branching
      • Compare
      • Commits
      • Concepts
      • Descriptions
      • Relationships
      • Reference Sets
      • Classification
      • Importing RF2
      • Exporting RF2
    • CIS API
    • FHIR API
      • CodeSystem
      • ValueSet
      • ConceptMap
  • Backup and Restore
    • Curator
  • Migrate from 6.x
Powered by GitBook
On this page
Export as PDF
  1. Set up Snow Owl
  2. Important System configuration

Number of threads

Snow Owl uses a number of thread pools for different types of operations. It is important that it is able to create new threads whenever needed. Make sure that the number of threads that the Snow Owl user can create is at least 4096.

This can be done by setting ulimit -u 4096 as root before starting Snow Owl, or by setting nproc to 4096 in /etc/security/limits.conf.

The package distributions when run as services under systemd will configure the number of threads for the Snow Owl process automatically. No additional configuration is required.

Last updated 5 years ago