ci: use local_memory_estimate (envoyproxy#7558)

Signed-off-by: Lizan Zhou <lizan@tetrate.io>

.bazelrc

@@ -1,12 +1,7 @@
 # Envoy specific Bazel build/test options.
-
-# Bazel doesn't need more than 200MB of memory based on memory profiling:
-# https://docs.bazel.build/versions/master/skylark/performance.html#memory-profiling
-# Limiting JVM heapsize here to let it do GC more when approaching the limit to
-# leave room for compiler/linker.
-startup --host_jvm_args=-Xmx512m
 build --workspace_status_command=bazel/get_workspace_status
 build --experimental_remap_main_repo
+build --experimental_local_memory_estimate
 build --host_force_python=PY2
 build --action_env=BAZEL_LINKLIBS=-l%:libstdc++.a
 build --action_env=BAZEL_LINKOPTS=-lm:-static-libgcc

ci/build_setup.sh

@@ -58,7 +58,7 @@ fi
 export BAZEL_QUERY_OPTIONS="${BAZEL_OPTIONS}"
 export BAZEL_BUILD_OPTIONS="--strategy=Genrule=standalone --spawn_strategy=standalone \
   --verbose_failures ${BAZEL_OPTIONS} --action_env=HOME --action_env=PYTHONUSERBASE \
-  --jobs=${NUM_CPUS} --show_task_finish --experimental_generate_json_trace_profile \
+  --local_cpu_resources=${NUM_CPUS} --show_task_finish --experimental_generate_json_trace_profile \
   --test_env=HOME --test_env=PYTHONUSERBASE --cache_test_results=no --test_output=all \
   ${BAZEL_BUILD_EXTRA_OPTIONS} ${BAZEL_EXTRA_TEST_OPTIONS}"
 

ci/do_ci.sh

@@ -238,8 +238,10 @@ elif [[ "$CI_TARGET" == "bazel.coverage" ]]; then
   setup_clang_toolchain
   echo "bazel coverage build with tests ${TEST_TARGETS}"
 
-  # LLVM coverage is a memory hog too.
-  [ -z "$CIRCLECI" ] || export BAZEL_BUILD_OPTIONS="${BAZEL_BUILD_OPTIONS} --local_cpu_resources=6"
+  # Reduce the amount of memory Bazel tries to use to prevent it from launching too many subprocesses.
+  # This should prevent the system from running out of memory and killing tasks. See discussion on
+  # https://github.com/envoyproxy/envoy/pull/5611.
+  [ -z "$CIRCLECI" ] || export BAZEL_BUILD_OPTIONS="${BAZEL_BUILD_OPTIONS} --local_ram_resources=12288"
 
   test/run_envoy_bazel_coverage.sh ${TEST_TARGETS}
   collect_build_profile coverage