With the default configuration, --max-old-space-size should work for values up to 4GiB.
If you need more, you need to disable pointer compression (which implies disabling the sandbox, because the sandbox relies on compressed pointers for its isolation mechanics). That's easy to do with: v8_enable_pointer_compression = false v8_enable_sandbox = false Note that this will increase memory consumption by probably around 60-70% (pointers become twice as big, non-pointer data such as numbers and string characters remains the same, so the overall balance depends on your workload). This will allow you to configure arbitrary maximum heap sizes. Note that you need to #define (or not define) V8_COMPRESS_POINTERS for the parts of your embedding code that #include V8 headers such that it matches your V8 build configuration. On Tue, Aug 29, 2023 at 5:31 AM Ben Ernst <ben.ernst.optimat...@gmail.com> wrote: > Hey team. > > I've been following the conversations around pointer compression and the > memory usage caps that this feature imposes on v8. I compile my own V8 to > use in an embedded context. What is the current state of affairs of memory > limits in V8, and to what extent can I disable, increase, or workaround > them? What GN compile-time flags should I be setting? I'm currently on V8 > 11.6. I target only Windows 10+ and Ubuntu 18.04+. I used to set run-time > flag "--max-old-space-size" but that doesn't seem to do what it used to do. > > My existing compile flags are as follows: > > treat_warnings_as_errors=false > v8_enable_i18n_support=false > v8_monolithic=true > is_component_build=false > use_custom_libcxx=false > is_clang=false > v8_use_external_startup_data=false > > Thanks in advance! > Ben > > -- -- v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-dev/CAKSzg3Tw6LkGJkft72TRvCk9Se9Yk%2BxgW6scLdL5KSw1YM6NBg%40mail.gmail.com.
