Leave the Max-Heap-Size to 8Gb, we assume that enough swap space will be available on the host.

We can still override the max-heap-size if desired.

createSwapStorage.sh

@@ -3,8 +3,8 @@
 # Info found in: https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-20-04
 
 
-# Creating a Swap File with 2 Gb
-sudo fallocate -l 2G /swapfile
+# Creating a Swap File with 6 Gb
+sudo fallocate -l 6G /swapfile
 ls -lh /swapfile
 
 # Enabling the Swap File

installAndRun.sh

@@ -24,6 +24,8 @@ fi
 
 gradleVersion="8.1.1"
 
+shouldBeCarefulWithMaxHeap=0 # This is NOT a cmd-arg.
+
 if [[ justRun -eq 0 ]]; then
 
   if [[ avoidReInstallingPublicationsRetriever -eq 1 ]]; then
@@ -69,12 +71,14 @@ if [[ justRun -eq 0 ]]; then
 
   export PATH=/opt/gradle/gradle-${gradleVersion}/bin:$PATH
 
-  # Update the max-heap-size based on the machine's physical memory.
-  machine_memory_mb=$(grep MemTotal /proc/meminfo | awk '{print $2}' | xargs -I {} echo "scale=4; {}/1024" | bc)  # It returns the size in MB.
-  max_heap_size_mb=$(echo "($machine_memory_mb - 800)/1" | bc) # Leave 800 MB to the system (the "()/1" is used to take the floor value).
-  # Now, we replace the "-Xmx" parameter inside the "./build.gradle" file, with "-Xmx${max_heap_size}m"
-  echo -e "\n\nThe max-heap-size (-Xmx) will be set to: ${max_heap_size_mb}m\n\n"
-  sed -i "s/'-Xmx[0-9]\+[gm]'/'-Xmx${max_heap_size_mb}m'/g" ./build.gradle
+  if [[ shouldBeCarefulWithMaxHeap -eq 1 ]]; then
+    # Update the max-heap-size based on the machine's physical memory.
+    machine_memory_mb=$(grep MemTotal /proc/meminfo | awk '{print $2}' | xargs -I {} echo "scale=4; {}/1024" | bc)  # It returns the size in MB.
+    max_heap_size_mb=$(echo "($machine_memory_mb - 800)/1" | bc) # Leave 800 MB to the system (the "()/1" is used to take the floor value).
+    # Now, we replace the "-Xmx" parameter inside the "./build.gradle" file, with "-Xmx${max_heap_size}m"
+    echo -e "\n\nThe max-heap-size (-Xmx) will be set to: ${max_heap_size_mb}m\n\n"
+    sed -i "s/'-Xmx[0-9]\+[gm]'/'-Xmx${max_heap_size_mb}m'/g" ./build.gradle
+  fi
 
   gradle wrapper --gradle-version=${gradleVersion} --distribution-type=bin
 

src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java

@@ -55,7 +55,6 @@ public class GeneralController {
             shouldShutdownWorker = true;
 
         finalMsg += " The worker will shutdown, after finishing current work.";
-
         logger.info(initMsg + finalMsg);
         return ResponseEntity.ok().body(finalMsg + "\n");
     }