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Re: Perl Memory problem ... (Memory Tools)

by eyepopslikeamosquito (Bishop)
on May 10, 2020 at 05:49 UTC ( #11116639=note: print w/replies, xml ) Need Help??

in reply to Perl Memory problem ...

If you give us more information we should be able to help. Meanwhile, these old nodes might give you a clue as to what your problem might be:

General Areas to consider when faced with a Memory Leak

  • Stability: Once your process grows to a certain size, does it stay there, or does it grow further over time?
  • Large CPAN Modules. Are you using any?
  • Circular references. See Eliminate circular reference memory leak using weaken (Perl Maven).
  • Scoping.
  • File/Database handling.
  • Tools. Try one or more from the following section.

Perl Tools and Advice

  • Mini-Tutorial: Perl's Memory Management by ikegami
  • As pointed out by dave_the_m: "once the perl interpreter has exhausted all memory, there's very little it can do. There is a reserved fixed buffer to allow it to display the OOM error itself, but doing anything complex like displaying a Carp::confess()-like stack backtrace would require many memory allocations to generate the display, all of which would themselves fail".

General Tools

  • Clang (Clang is a compiler front end for the C, C++, Objective-C, and Objective-C++ programming languages ... includes a static analyzer, and several code analysis tools ... Clang operates in tandem with the LLVM compiler back end)
  • LLVM (LLVM is a set of compiler and toolchain technologies that can be used to develop a front end for any programming language and a back end for any instruction set architecture ... designed around a language-independent intermediate representation (IR) that serves as a portable, high-level assembly language that can be optimized with a variety of transformations over multiple passes)

Static Code Analysis

Code Profiling and Optimization

Testing Concurrent Software

Security Testing

Some Related PM Nodes

Nodes Added Later

Updated: Many extra references were added long after the original reply was made.

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