Update linux env file for SPLUNK_MEMORY_TOTAL_MIB (#80)

Author: jchengsfx

internal/buildscripts/packaging/fpm/etc/otel/collector/splunk_env.example

@@ -26,11 +26,24 @@ SPLUNK_INGEST_URL=https://ingest.us0.signalfx.com
 # Splunk trace endpoint URL.
 SPLUNK_TRACE_URL=https://ingest.us0.signalfx.com/v2/trace
 
-# How much memory to allocate to the ballast. This should be set to 1/3 to 1/2 of configured memory.
-SPLUNK_BALLAST_SIZE_MIB=683
-
 # Splunk HEC endpoint URL.
 SPLUNK_HEC_URL=https://ingest.us0.signalfx.com/v1/log
 
 # Splunk HEC token.
 SPLUNK_HEC_TOKEN=12345
+
+# Total memory in MIB to allocate to the collector.
+# Automatically configures the ballast, memory limit, and memory spike.
+# To explicitly set these values, uncomment and set the
+# SPLUNK_BALLAST_SIZE_MIB, SPLUNK_MEMORY_LIMIT_PERCENTAGE, and
+# SPLUNK_MEMORY_SPIKE_PERCENTAGE variables below.
+SPLUNK_MEMORY_TOTAL_MIB=1024
+
+# How much memory to allocate to the ballast. This should be set to 1/3 to 1/2 of configured memory.
+# SPLUNK_BALLAST_SIZE_MIB=683
+
+# Maximum total memory to be allocated by the process heap.
+# SPLUNK_MEMORY_LIMIT_PERCENTAGE=90
+
+# Maximum spike between the measurements of memory usage.
+# SPLUNK_MEMORY_SPIKE_PERCENTAGE=20