validation: Only run BlockTx validation when DB fully synced

cardano-db/app/Cardano/Db/App/Validate/BlockTxs.hs

@@ -24,10 +24,11 @@ import qualified System.Random as Random
 
 validateEpochBlockTxs :: IO ()
 validateEpochBlockTxs = do
+  fullySynced <- runDbNoLogging queryIsFullySynced
   mLatestEpoch <- runDbNoLogging queryLatestCachedEpochNo
   case mLatestEpoch of
     Nothing -> putStrLn "Epoch table is empty"
-    Just latest -> validateLatestBlockTxs latest
+    Just latest -> validateLatestBlockTxs fullySynced latest
 
 -- -----------------------------------------------------------------------------
 
@@ -37,10 +38,15 @@ data ValidateError = ValidateError
   , veTxCountExpected :: !Word64
   }
 
-validateLatestBlockTxs :: Word64 -> IO ()
-validateLatestBlockTxs latestEpoch = do
-  validateBlockTxs latestEpoch
-  validateBlockTxs =<< Random.randomRIO (0, latestEpoch - 1)
+validateLatestBlockTxs :: Bool -> Word64 -> IO ()
+validateLatestBlockTxs fullySynced latestEpoch = do
+  if not fullySynced
+    then putStrLn "Not fully synced so not running BlockTx validation"
+    else do
+      -- This validation seems to be quite DB intensive, so only run it
+      -- when the DB is fully synced.
+      validateBlockTxs latestEpoch
+      validateBlockTxs =<< Random.randomRIO (0, latestEpoch - 1)
 
 validateBlockTxs :: Word64 -> IO ()
 validateBlockTxs epoch = do