smiklosovic commented on code in PR #4166:
URL: https://github.com/apache/cassandra/pull/4166#discussion_r2120566354


##########
conf/cassandra-env.sh:
##########
@@ -199,6 +199,44 @@ if [ "x$CASSANDRA_HEAPDUMP_DIR" = "x" ]; then
 fi
 JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date 
+%s`-pid$$.hprof"
 
+# Cassandra heap dump files management options:
+# if not set externally, this script assigns defauls:
+#  - enable heap dump files clean up
+#  - keeping last 2 files
+#  - keeping 1 oldest file to help identify first OOM incident
+if [ "x$CASSANDRA_HEAPDUMP_CLEAN" = "x" ]; then
+    CASSANDRA_HEAPDUMP_CLEAN=1
+fi
+if [ "x$CASSANDRA_HEAPDUMP_KEEP_LAST_N_FILES" = "x" ]; then
+    CASSANDRA_HEAPDUMP_KEEP_LAST_N_FILES=2
+fi
+if [ "x$CASSANDRA_HEAPDUMP_KEEP_FIRST_N_FILES" = "x" ]; then
+    CASSANDRA_HEAPDUMP_KEEP_FIRST_N_FILES=1

Review Comment:
   @gowa Why do we even have this property? "keep newest n files" makes sense 
to me, why would we want to keep _oldest n files_? Under what circumstance an 
operator would want to keep oldest around and remove the newest?



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