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lib/Config/Model/models/Systemd/Common/Exec.pl  view on Meta::CPAN

          'no',
          'yes'
        ]
      },
      'MemoryTHP',
      {
        'description' => 'Transparent Hugepages (THPs) is a Linux kernel feature that manages memory
using larger pages (2MB on x86, compared to the default 4KB). The main goal is to improve memory management
efficiency and system performance, especially for memory-intensive applications.
However, it can cause drawbacks in some scenarios, such as memory regression and latency spikes.
THP policy is governed for the entire system via C</sys/kernel/mm/transparent_hugepage/enabled>.
However, it can be overridden for individual workloads via
L<prctl(2)>.
C<MemoryTHP> may be used to disable THPs at process invocation time to stop providing
THPs for workloads where the drawbacks outweigh the advantages.
When C<MemoryTHP> is set to C<inherit> or not set at all, systemd
inherits THP settings from the process that starts it and no
L<prctl(2)>C<PR_SET_THP_DISABLE> call is made.
When set to C<disable>, C<MemoryTHP> disables THPs completely for the process,
irrespecitive of global THP controls.
When set to C<madvise>, C<MemoryTHP> disables THPs for the process except when

lib/Config/Model/models/Systemd/Section/Service.pod  view on Meta::CPAN

Note that this functionality might not be available, for example if KSM is disabled in the
kernel, or the kernel does not support controlling KSM at the process level through
L<prctl(2)>. I< Optional. Type boolean.  > 

=head2 MemoryTHP

Transparent Hugepages (THPs) is a Linux kernel feature that manages memory
using larger pages (2MB on x86, compared to the default 4KB). The main goal is to improve memory management
efficiency and system performance, especially for memory-intensive applications.
However, it can cause drawbacks in some scenarios, such as memory regression and latency spikes.
THP policy is governed for the entire system via C</sys/kernel/mm/transparent_hugepage/enabled>.
However, it can be overridden for individual workloads via
L<prctl(2)>.
C<MemoryTHP> may be used to disable THPs at process invocation time to stop providing
THPs for workloads where the drawbacks outweigh the advantages.
When C<MemoryTHP> is set to C<inherit> or not set at all, systemd
inherits THP settings from the process that starts it and no
L<prctl(2)>C<PR_SET_THP_DISABLE> call is made.
When set to C<disable>, C<MemoryTHP> disables THPs completely for the process,
irrespecitive of global THP controls.
When set to C<madvise>, C<MemoryTHP> disables THPs for the process except when