Increase heap log size to five GB.

src/util/memUsage.ts

@@ -219,7 +219,7 @@ function ongoingMemoryDump() {
         );
         if (loggingEnabled) {
           // Enforce heap snapshot folder size limit (< 1GB) before writing a new snapshot.
-          const MAX_DIR_BYTES = 1024 * 1024 * 1024; // 1GB
+          const MAX_DIR_BYTES = 5 * 1024 * 1024 * 1024; // 5GB
           const TARGET_REDUCED_BYTES = Math.floor(MAX_DIR_BYTES * 0.9); // prune down to 90%
           const baseDir = path.dirname(log.transports.file.getFile().path);
           const heapDir = path.join(baseDir, "heap-snapshots");