diff --git a/db/plain_table_db_test.cc b/db/plain_table_db_test.cc
index 9f836b76ec..18b47e1a85 100644
--- a/db/plain_table_db_test.cc
+++ b/db/plain_table_db_test.cc
@@ -190,7 +190,7 @@ class TestPlainTableReader : public PlainTableReader {
                          file_size, bloom_bits_per_key, hash_table_ratio,
                          index_sparseness, table_properties),
         expect_bloom_not_match_(expect_bloom_not_match) {
-    Status s = PopulateIndex();
+    Status s = PopulateIndex(const_cast<TableProperties*>(table_properties));
     ASSERT_TRUE(s.ok());
   }
 
@@ -265,6 +265,19 @@ TEST(PlainTableDBTest, Flush) {
       ASSERT_OK(Put("0000000000000bar", "v2"));
       ASSERT_OK(Put("1000000000000foo", "v3"));
       dbfull()->TEST_FlushMemTable();
+
+      TablePropertiesCollection ptc;
+      reinterpret_cast<DB*>(dbfull())->GetPropertiesOfAllTables(&ptc);
+      ASSERT_EQ(1, ptc.size());
+      auto row = ptc.begin();
+      auto tp = row->second;
+      ASSERT_EQ(
+          total_order ? "4" : "12",
+          (tp->user_collected_properties).at("plain_table_hash_table_size"));
+      ASSERT_EQ(
+          total_order ? "9" : "0",
+          (tp->user_collected_properties).at("plain_table_sub_index_size"));
+
       ASSERT_EQ("v3", Get("1000000000000foo"));
       ASSERT_EQ("v2", Get("0000000000000bar"));
     }
diff --git a/include/rocksdb/table_properties.h b/include/rocksdb/table_properties.h
index 55b83f4411..aa8b8a0b8a 100644
--- a/include/rocksdb/table_properties.h
+++ b/include/rocksdb/table_properties.h
@@ -23,7 +23,7 @@ namespace rocksdb {
 //      ++pos) {
 //   ...
 // }
-typedef std::map<std::string, std::string> UserCollectedProperties;
+typedef std::map<const std::string, std::string> UserCollectedProperties;
 
 // TableProperties contains a bunch of read-only properties of its associated
 // table.
diff --git a/table/plain_table_reader.cc b/table/plain_table_reader.cc
index ac0505a459..9a93e205d5 100644
--- a/table/plain_table_reader.cc
+++ b/table/plain_table_reader.cc
@@ -104,8 +104,8 @@ PlainTableReader::PlainTableReader(
       kHashTableRatio(hash_table_ratio),
       kBloomBitsPerKey(bloom_bits_per_key),
       kIndexIntervalForSamePrefixKeys(index_sparseness),
-      table_properties_(table_properties),
-      data_end_offset_(table_properties_->data_size),
+      table_properties_(nullptr),
+      data_end_offset_(table_properties->data_size),
       user_key_len_(table_properties->fixed_key_len) {
   assert(kHashTableRatio >= 0.0);
 }
@@ -137,7 +137,7 @@ Status PlainTableReader::Open(
       bloom_bits_per_key, hash_table_ratio, index_sparseness, props));
 
   // -- Populate Index
-  s = new_reader->PopulateIndex();
+  s = new_reader->PopulateIndex(props);
   if (!s.ok()) {
     return s;
   }
@@ -364,7 +364,10 @@ void PlainTableReader::FillIndexes(
       index_size_, kSubIndexSize);
 }
 
-Status PlainTableReader::PopulateIndex() {
+Status PlainTableReader::PopulateIndex(TableProperties* props) {
+  assert(props != nullptr);
+  table_properties_.reset(props);
+
   // options.prefix_extractor is requried for a hash-based look-up.
   if (options_.prefix_extractor.get() == nullptr && kHashTableRatio != 0) {
     return Status::NotSupported(
@@ -409,6 +412,14 @@ Status PlainTableReader::PopulateIndex() {
   // From the temp data structure, populate indexes.
   FillIndexes(sub_index_size_needed, hash_to_offsets, entries_per_bucket);
 
+  // Fill two table properties.
+  // TODO(sdong): after we have the feature of storing index in file, this
+  // properties need to be populated to index_size instead.
+  props->user_collected_properties["plain_table_hash_table_size"] =
+      std::to_string(index_size_ * 4U);
+  props->user_collected_properties["plain_table_sub_index_size"] =
+      std::to_string(sub_index_size_needed);
+
   return Status::OK();
 }
 
diff --git a/table/plain_table_reader.h b/table/plain_table_reader.h
index debb883721..7fa3644efe 100644
--- a/table/plain_table_reader.h
+++ b/table/plain_table_reader.h
@@ -87,6 +87,9 @@ class PlainTableReader: public TableReader {
   // PopulateIndex() builds index of keys. It must be called before any query
   // to the table.
   //
+  // props: the table properties object that need to be stored. Ownership of
+  //        the object will be passed.
+  //
   // index_ contains buckets size of index_size_, each is a
   // 32-bit integer. The lower 31 bits contain an offset value (explained below)
   // and the first bit of the integer indicates type of the offset.
@@ -122,7 +125,7 @@ class PlainTableReader: public TableReader {
   //    ....
   //   record N file offset:  fixedint32
   // <end>
-  Status PopulateIndex();
+  Status PopulateIndex(TableProperties* props);
 
  private:
   struct IndexRecord;