diff --git a/tools/benchmark.sh b/tools/benchmark.sh
index 0ba1081e19..31df59cd7a 100755
--- a/tools/benchmark.sh
+++ b/tools/benchmark.sh
@@ -20,6 +20,7 @@ fi
 K=1024
 M=$((1024 * K))
 G=$((1024 * M))
+T=$((1024 * T))
 
 if [ -z $DB_DIR ]; then
   echo "DB_DIR is not defined"
@@ -44,16 +45,16 @@ if [ ! -z $DB_BENCH_NO_SYNC ]; then
   syncval="0";
 fi
 
-num_threads=${NUM_THREADS:-16}
+num_threads=${NUM_THREADS:-64}
 mb_written_per_sec=${MB_WRITE_PER_SEC:-0}
 # Only for tests that do range scans
 num_nexts_per_seek=${NUM_NEXTS_PER_SEEK:-10}
-cache_size=${CACHE_SIZE:-$((1 * G))}
+cache_size=${CACHE_SIZE:-$((17179869184))}
 compression_max_dict_bytes=${COMPRESSION_MAX_DICT_BYTES:-0}
-compression_type=${COMPRESSION_TYPE:-snappy}
+compression_type=${COMPRESSION_TYPE:-zstd}
 duration=${DURATION:-0}
 
-num_keys=${NUM_KEYS:-$((1 * G))}
+num_keys=${NUM_KEYS:-8000000000}
 key_size=${KEY_SIZE:-20}
 value_size=${VALUE_SIZE:-400}
 block_size=${BLOCK_SIZE:-8192}
@@ -99,7 +100,6 @@ const_params="
 
 l0_config="
   --level0_file_num_compaction_trigger=4 \
-  --level0_slowdown_writes_trigger=12 \
   --level0_stop_writes_trigger=20"
 
 if [ $duration -gt 0 ]; then
@@ -108,30 +108,35 @@ fi
 
 params_w="$const_params \
           $l0_config \
-          --max_background_jobs=20 \
-          --max_write_buffer_number=8"
+          --max_background_compactions=16 \
+          --max_write_buffer_number=8 \
+          --max_background_flushes=7"
 
 params_bulkload="$const_params \
-                 --max_background_jobs=20 \
+                 --max_background_compactions=16 \
                  --max_write_buffer_number=8 \
+                 --allow_concurrent_memtable_write=false \
+                 --max_background_flushes=7 \
                  --level0_file_num_compaction_trigger=$((10 * M)) \
                  --level0_slowdown_writes_trigger=$((10 * M)) \
                  --level0_stop_writes_trigger=$((10 * M))"
 
+params_fillseq="$params_w \
+		--allow_concurrent_memtable_write=false"
 #
 # Tune values for level and universal compaction.
 # For universal compaction, these level0_* options mean total sorted of runs in
 # LSM. In level-based compaction, it means number of L0 files.
 #
 params_level_compact="$const_params \
-                --max_background_jobs=16 \
+                --max_background_flushes=4 \
                 --max_write_buffer_number=4 \
                 --level0_file_num_compaction_trigger=4 \
                 --level0_slowdown_writes_trigger=16 \
                 --level0_stop_writes_trigger=20"
 
 params_univ_compact="$const_params \
-                --max_background_jobs=20 \
+                --max_background_flushes=4 \
                 --max_write_buffer_number=4 \
                 --level0_file_num_compaction_trigger=8 \
                 --level0_slowdown_writes_trigger=16 \
@@ -232,7 +237,7 @@ function run_manual_compaction_worker {
        --memtablerep=vector \
        --allow_concurrent_memtable_write=false \
        --disable_wal=1 \
-       --max_background_jobs=$4 \
+       --max_background_compactions=$4 \
        --seed=$( date +%s ) \
        2>&1 | tee -a $fillrandom_output_file"
 
@@ -276,7 +281,7 @@ function run_univ_compaction {
 
   # Define a set of benchmarks.
   subcompactions=(1 2 4 8 16)
-  max_background_jobs=(20 20 10 5 4)
+  max_background_compactions=(16 16 8 4 2)
 
   i=0
   total=${#subcompactions[@]}
@@ -285,7 +290,7 @@ function run_univ_compaction {
   while [ "$i" -lt "$total" ]
   do
     run_manual_compaction_worker $io_stats $compaction_style ${subcompactions[$i]} \
-      ${max_background_jobs[$i]}
+      ${max_background_compactions[$i]}
     ((i++))
   done
 }
@@ -311,7 +316,7 @@ function run_fillseq {
   cmd="./db_bench --benchmarks=fillseq \
        --use_existing_db=0 \
        --sync=0 \
-       $params_w \
+       $params_fillseq \
        --min_level_to_compress=0 \
        --threads=1 \
        --memtablerep=vector \
@@ -465,6 +470,12 @@ for job in ${jobs[@]}; do
   elif [ $job = fillseq_enable_wal ]; then
     run_fillseq 0
   elif [ $job = overwrite ]; then
+    syncval="0"
+    params_w="$params_w \
+	--writes=125000000 \
+	--subcompactions=4 \
+	--soft_pending_compaction_bytes_limit=$((1 * T)) \
+	--hard_pending_compaction_bytes_limit=$((4 * T)) "
     run_change overwrite
   elif [ $job = updaterandom ]; then
     run_change updaterandom