git-hulk commented on code in PR #1903:
URL: https://github.com/apache/kvrocks/pull/1903#discussion_r1402015610


##########
kvrocks.conf:
##########
@@ -863,5 +863,11 @@ rocksdb.write_options.memtable_insert_hint_per_batch no
 # Default: yes
 rocksdb.rate_limiter_auto_tuned yes
 
+# Support rocksdb `void_unnecessary_blocking_io` in iteration scenario
+# if user don't care iteration slowing by pruge blocking io, mark it no
+# see https://github.com/facebook/rocksdb/wiki/IO#avoid-blocking-io 
+# Default: yes
+# rocksdb.avoid_unnecessary_blocking_io yes

Review Comment:
   ```suggestion
   # Enable this option will schedule the deletion of obsolete files in a 
background thread 
   # on iterator destruction. It can reduce the latency if there are many files 
to be removed.
   # see https://github.com/facebook/rocksdb/wiki/IO#avoid-blocking-io 
   #
   # Default: yes
   # rocksdb.avoid_unnecessary_blocking_io yes
   ```



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