On 09/06/2021 19:12, James H. H. Lampert wrote:
We are beginning to migrate some of our customers from Tomcat 7 to
Tomcat 8.5.
Some of them have performance issues even with heap allocations of
-Xms4096m -Xmx5120m
Would it be necessary to go even bigger with Tomcat 8.5?
Generally I'd say the heap requirements shouldn't change noticeably
between Tomcat versions but, particularly with the changes to resource
loading in 8.5, there will be some changes and it is possible that they
are large for some edge cases.
As always with performance issues, my recommendation is to use a
profiler and get some data on what is going on. That makes figuring and
the why and then the right solution a lot easier.
Mark
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