> What is the situation with modern Z 9/10 hardware: should we change our > scripts to build 64-bit or stay with 32-bit? The app is relatively small - > let's say > 1.5 Mb of memory for a resident set and modest CPU consumption - but a > fully loaded customer configuration may have hundreds of instances running > at any one time (persistent, once started they stay alive), so any > performance and memory consumption differences between 32 & 64-bit can > add up.
Given that there are no supported 31-bit-only major distributions (other than Debian) remaining, you probably should bite the bullet and go 64-bit. Z9 hardware is being aggressively pushed out with the usual maintenance cost increases; z10 is the baseline CPU at this point. While you can continue to run 31-bit code, going 64-bit everywhere will take out a lot of dependencies and testing. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
