-- -- __________________________________________________________________________________ Prof. Dr. Rony G. Flatscher Department Wirtschaftsinformatik und Operations Management Institut für Wirtschaftsinformatik und Gesellschaft D2c 2.086 WU Wien Welthandelsplatz 1 A-1020 Wien/Vienna, Austria/Europe http://www.wu.ac.at __________________________________________________________________________________ -------- Forwarded Message -------- Subject: 500 instances of tomcat on the same server Date: Sat, 26 Jun 2021 02:58:18 +0000 From: Eric Robinson eric.robinson@psmnv.com Reply-To: Tomcat Users List users@tomcat.apache.org To: Tomcat Users List users@tomcat.apache.org We can run 75 to 125 instances of tomcat on a single Linux server with 12 cores and 128GB RAM. It works great. CPU is around 25%, our JVMs are not throwing OOMEs, iowait is minimal, and network traffic is about 30Mbps. We're happy with the results. Now we're upping the ante. We have a 48-core server with 1TB RAM, and we're planning to run 600+ tomcat instances on it simultaneously. What caveats or pitfalls should we watch out for? Are there any hard limits that would prevent this from working as expected? -Eric Disclaimer : This email and any files transmitted with it are confidential and intended solely for intended recipients. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physician Select Management. Warning: Although Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments.