MDEV-15372: Parallel slave speedup very limited when log_slave_updates=OFF

spetrunia · spetrunia · commit 00a556c0c20f · 2018-02-21T17:00:03.000+03:00
Part #2: some transactions have m_rocksdb_tx==NULL (and most functions of Rdb_transction_impl handle this case. Do like they do)
diff --git a/storage/rocksdb/ha_rocksdb.cc b/storage/rocksdb/ha_rocksdb.cc
@@ -2240,7 +2240,8 @@ class Rdb_transaction_impl : public Rdb_transaction {
   }
 
   void set_sync(bool sync) override {
-    m_rocksdb_tx->GetWriteOptions()->sync = sync;
+    if (m_rocksdb_tx)
+      m_rocksdb_tx->GetWriteOptions()->sync = sync;
   }
 
   void release_lock(rocksdb::ColumnFamilyHandle *const column_family,

Original file line number	Diff line number	Diff line change
`@@ -2240,7 +2240,8 @@ class Rdb_transaction_impl : public Rdb_transaction {`
`2240`	`2240`	`}`
`2241`	`2241`
`2242`	`2242`	`void set_sync(bool sync) override {`
`2243`		`- m_rocksdb_tx->GetWriteOptions()->sync = sync;`
	`2243`	`+ if (m_rocksdb_tx)`
	`2244`	`+ m_rocksdb_tx->GetWriteOptions()->sync = sync;`
`2244`	`2245`	`}`
`2245`	`2246`
`2246`	`2247`	`void release_lock(rocksdb::ColumnFamilyHandle *const column_family,`