I am told that the reasons were:
(1) It consumed a lot of ESQA for the RSM control
blocks that manage the shared pages. (However, that is
no longer an issue because those control blocks were
moved to the PFT data space later in z/OS 2.4).
(2) The performance was no better than Copy Now.
Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp.
Poughkeepsie NY
> According to the "Summary of changes for z/OS UNIX System Services
> Planning for Version 2 Release 4 (V2R4)" (see https://www.ibm.com/
>
support/knowledgecenter/SSLTBW_2.4.0/com.ibm.zos.v2r4.bpxb200/bpxb2soc24.htm
> ), copy on write for fork() has been removed from z/OS. It will be
> interesting to benchmark the performance of fork() between 2.3 and
> 2.4 on a variety of processes.
>
> I wonder why this was done? (Hi, Peter Relson -- hint, hint...)
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
