2 ms·

Right on the heels of 6.19 breaking tcmalloc and Mongo

• matharmin 6mo ago
  Yup - interesting to see so much written about Postgres having a performance regression on Linux 7.0, in a scenario that affects almost no-one in practice. Meanwhile MongoDB refuses to run at all on Linux 7.0 due to some issue with tcmalloc. https://jira.mongodb.org/browse/SERVER-121885 https://jira.mongodb.org/browse/SERVER-121885
  • duskwuff 6mo ago
    The underlying tcmalloc issue is interesting - the library was relying on an implementation detail of the rseq kernel API which was never guaranteed, and which already generated warnings in previous versions. https://lore.kernel.org/all/20260126204745.GP171111@noisy.programming.kicks-ass.net/ https://lore.kernel.org/all/20260126204745.GP171111@noisy.pr...
    • nijave 6mo ago
      Implemented behavior of the interface vs documented behavior of the interface I thought the warnings were only generated when you turned on a kernel config "that no one uses in practice"