Patch Package:           OTP 22.3.4.24
Git Tag:                 OTP-22.3.4.24
Date:                    2021-12-21
Trouble Report Id:       OTP-17796
Seq num:                 ERIERL-729
System:                  OTP
Release:                 22
Application:             erts-10.7.2.16
Predecessor:             OTP 22.3.4.23

 Check out the git tag OTP-22.3.4.24, and build a full OTP system
 including documentation. Apply one or more applications from this
 build as patches to your installation using the 'otp_patch_apply'
 tool. For information on install requirements, see descriptions for
 each application version below.

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 --- HIGHLIGHTS ------------------------------------------------------
 ---------------------------------------------------------------------

  OTP-17796    Application(s): erts
               Related Id(s): ERIERL-729, PR-5473

               Responsiveness of processes executing on normal or low
               priority could suffer due to code purging or literal
               area removal on systems with a huge amount of
               processes. This since during these operations all
               processes on the system were scheduled for execution at
               once.

               This problem has been fixed by introducing a limit on
               outstanding purge and copy literal requests in the
               system. By default this limit is set to twice the
               amount of schedulers on the system. This will ensure
               that schedulers will have enough work scheduled to
               perform these operations as quickly as possible at the
               same time as other work will be interleaved to a much
               higher degree. Performance of these operations will
               however be somewhat degraded due to the overhead of
               enforcing this limit compared to when using a very
               large limit.

               This limit can be set by passing the +zosrl command
               line argument to erl, or by calling
               erlang:system_flag(outstanding_system_requests_limit,
               NewLimit).


 ---------------------------------------------------------------------
 --- erts-10.7.2.16 --------------------------------------------------
 ---------------------------------------------------------------------

 Note! The erts-10.7.2.16 application *cannot* be applied
       independently of other applications on an arbitrary OTP 22
       installation.

       On a full OTP 22 installation, also the following runtime
       dependency has to be satisfied:
       -- kernel-6.5.1 (first satisfied in OTP 22.2)


 --- Improvements and New Features ---

  OTP-17796    Application(s): erts
               Related Id(s): ERIERL-729, PR-5473

               *** HIGHLIGHT ***

               Responsiveness of processes executing on normal or low
               priority could suffer due to code purging or literal
               area removal on systems with a huge amount of
               processes. This since during these operations all
               processes on the system were scheduled for execution at
               once.

               This problem has been fixed by introducing a limit on
               outstanding purge and copy literal requests in the
               system. By default this limit is set to twice the
               amount of schedulers on the system. This will ensure
               that schedulers will have enough work scheduled to
               perform these operations as quickly as possible at the
               same time as other work will be interleaved to a much
               higher degree. Performance of these operations will
               however be somewhat degraded due to the overhead of
               enforcing this limit compared to when using a very
               large limit.

               This limit can be set by passing the +zosrl command
               line argument to erl, or by calling
               erlang:system_flag(outstanding_system_requests_limit,
               NewLimit).


 Full runtime dependencies of erts-10.7.2.16: kernel-6.5.1, sasl-3.3,
 stdlib-3.5


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