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Status Not under consideration
Workspace App Connect
Created by Guest
Created on May 21, 2024

RELATED IDEAS

Certify ACE for the use of jemalloc

To address memory issues in some of our ACE integration servers, we have been evaluating the use of an alternate memory allocator (jemalloc, from the Red Hat EPEL8 packages) instead of relying on the default one coming with our Red Hat Enterprise Linux 8 VMs (glibc allocator).

jemalloc is an open source memory allocator initially created to address (native) memory fragmentation issues in Mozilla Firefox. Its development has since been backed by Facebook and it is used in numerous products (freebsd, redis, to name a few). On top of its ability to reduce the memory fragmentation in long running processes, it is also capable of returning unused memory pages to the OS, which makes it particularly interesting in some of our workloads.

- https://jemalloc.net/

- https://github.com/jemalloc/jemalloc

When running ACE with jemalloc, our experiments have demonstrated significant improvements in the memory utilization trend of some workloads, especially when coupled with MQSI_FREE_MASTER_PARSERS.

As we did not notice any technical issue/regression, we would like to request that the use of jemalloc with IBM ACE V12 be officially supported by IBM.

Idea priority High
  • Admin
    Ben Thompson
    Reply
    |     Nov 20, 2024

    Thank you for taking the time to raise this idea, and for the information exchanged on the support case which led to this suggestion. Unfortunately we do not intend to carry forward the suggestion to officially test and certify the ACE product with the jemalloc allocator. That said we want to reiterate that we have no problem if users would like to use this third party technology, and that the service organisation would not explicitly turn away a case on the grounds that you have chosen to use an allocator such as this if dealing with an unrelated issue … but if a product problem were suspected to be caused by your use of the allocator, we'd reserve the right to have you switch the implementation should further analysis be required. We hope this helps clarify the situation and leaves you with an option to use your preferred tool if you derive benefit from it, whilst also making clear that IBM does not currently plan to follow any kind of independent testing or certification process with this technology.

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