Will the Hardware req enough for 500 users as mentioned at this link https://confluence.atlassian.com/doc/confluence-data-center-performance-790795852.html
You're looking at performance testing hw reference, but you are likely looking for sizing recommendations: https://confluence.atlassian.com/doc/server-hardware-requirements-guide-30736403.html
Other useful reads (optional):
https://confluence.atlassian.com/enterprise/node-sizing-overview-for-atlassian-data-center-941612709.html
https://confluence.atlassian.com/enterprise/confluence-data-center-technical-overview-612959401.html
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