diff --git a/src/main/java/eu/openaire/urls_worker/controllers/FullTextsController.java b/src/main/java/eu/openaire/urls_worker/controllers/FullTextsController.java
index 67d5b57..117c230 100644
--- a/src/main/java/eu/openaire/urls_worker/controllers/FullTextsController.java
+++ b/src/main/java/eu/openaire/urls_worker/controllers/FullTextsController.java
@@ -83,7 +83,7 @@ public class FullTextsController {
             return ResponseEntity.ok()
                     .contentType(MediaType.APPLICATION_OCTET_STREAM)
                     .header(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=\"" + zstdName + "\"")
-                    .body(new InputStreamResource(new BufferedInputStream(Files.newInputStream(Paths.get(zstdTarFileFullPath)), FilesCompressor.tenMb)));
+                    .body(new InputStreamResource(new BufferedInputStream(Files.newInputStream(Paths.get(zstdTarFileFullPath)), FilesCompressor.bufferSize)));
         } catch (Exception e) {
             String errorMsg = "Could not load the FileInputStream of the zstd-tar-file \"" + zstdTarFileFullPath + "\"!";
             logger.error(errorMsg, e);
@@ -115,7 +115,7 @@ public class FullTextsController {
             return ResponseEntity.ok()
                     .contentType(MediaType.APPLICATION_OCTET_STREAM)
                     .header(HttpHeaders.CONTENT_DISPOSITION, "inline; filename=\"" + file.getName() + "\"")
-                    .body(new InputStreamResource(new BufferedInputStream(Files.newInputStream(Paths.get(fullTextFileFullPath)), FilesCompressor.tenMb)));
+                    .body(new InputStreamResource(new BufferedInputStream(Files.newInputStream(Paths.get(fullTextFileFullPath)), FilesCompressor.bufferSize)));
         } catch (Exception e) {
             String errorMsg = "Could not load the FileInputStream of the full-text-file \"" + fullTextFileFullPath + "\"!";
             logger.error(errorMsg, e);
diff --git a/src/main/java/eu/openaire/urls_worker/util/FilesCompressor.java b/src/main/java/eu/openaire/urls_worker/util/FilesCompressor.java
index f4a4b92..791ed88 100644
--- a/src/main/java/eu/openaire/urls_worker/util/FilesCompressor.java
+++ b/src/main/java/eu/openaire/urls_worker/util/FilesCompressor.java
@@ -19,7 +19,7 @@ public class FilesCompressor {
 
     private static final Logger logger = LoggerFactory.getLogger(FilesCompressor.class);
 
-    public static final int tenMb = (10 * 1_048_576);
+    public static final int bufferSize = (5 * 1_048_576);   // 5 Mb
 
 
     public static File compressMultipleFilesIntoOne(long assignmentsCounter, int tarBatchCounter, List<String> filesToCompress, String baseDirectory)
@@ -37,8 +37,8 @@ public class FilesCompressor {
         String zStandardFileFullPath = tarFilePath + ".zstd";
         File zStandardFile = new File(zStandardFileFullPath);
 
-        try ( BufferedInputStream in = new BufferedInputStream(Files.newInputStream(Paths.get(tarFilePath)), tenMb);
-              ZstdCompressorOutputStream zOut = new ZstdCompressorOutputStream(new BufferedOutputStream(Files.newOutputStream(zStandardFile.toPath())), tenMb) )
+        try ( BufferedInputStream in = new BufferedInputStream(Files.newInputStream(Paths.get(tarFilePath)), bufferSize);
+              ZstdCompressorOutputStream zOut = new ZstdCompressorOutputStream(new BufferedOutputStream(Files.newOutputStream(zStandardFile.toPath())), bufferSize) )
         {
             int readByte;
             while ( (readByte = in.read()) != -1 ) {
@@ -67,7 +67,7 @@ public class FilesCompressor {
         int numTarredFiles = 0;
         File tarFile = new File(tarFileFullPath);
 
-        try ( TarArchiveOutputStream taos = new TarArchiveOutputStream(new BufferedOutputStream(Files.newOutputStream(tarFile.toPath()), tenMb)) )
+        try ( TarArchiveOutputStream taos = new TarArchiveOutputStream(new BufferedOutputStream(Files.newOutputStream(tarFile.toPath()), bufferSize)) )
         {
             for ( String fileName : filesToTar ) {
                 if ( addTarEntry(taos, fileName, baseDir) )
@@ -88,10 +88,10 @@ public class FilesCompressor {
 
     private static boolean addTarEntry(TarArchiveOutputStream taos, String fileName, String baseDir)
     {
-        boolean shouldCloseEntry = false;   // Useful in order to know if we should close the entry (an Exception may appear, and so we should not try to close it).
+        boolean shouldCloseEntry = false;   // Useful in order to know if we should close the entry (an Exception may appear when initializing the stream, and so we should not try to close it).
 
         Path fullFileNamePath = Paths.get(baseDir + fileName);
-        try ( BufferedInputStream fis = new BufferedInputStream(Files.newInputStream(fullFileNamePath), tenMb) )
+        try ( BufferedInputStream fis = new BufferedInputStream(Files.newInputStream(fullFileNamePath), bufferSize) )
         {
             TarArchiveEntry entry = new TarArchiveEntry(fileName);
             entry.setSize(Files.size(fullFileNamePath));    // Yes, tar requires that we set the size beforehand..