diff --git a/src/txdb.h b/src/txdb.h
index 7f5cf2b583..963f1006ea 100644
--- a/src/txdb.h
+++ b/src/txdb.h
@@ -21,8 +21,12 @@ class CBlockIndex;
 class CCoinsViewDBCursor;
 class uint256;
 
+//! Compensate for extra memory peak (x1.5-x1.9) at flush time.
+static constexpr int DB_PEAK_USAGE_FACTOR = 2;
+//! No need to flush if at least this much space still available.
+static constexpr int MAX_BLOCK_COINSDB_USAGE = 100 * DB_PEAK_USAGE_FACTOR;
 //! -dbcache default (MiB)
-static const int64_t nDefaultDbCache = 300;
+static const int64_t nDefaultDbCache = 600;
 //! max. -dbcache (MiB)
 static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
 //! min. -dbcache (MiB)
diff --git a/src/validation.cpp b/src/validation.cpp
index 7737c13e6e..390801d34f 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2005,10 +2005,10 @@ bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode, int n
         nLastSetChain = nNow;
     }
     int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
-    int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * 2; // Compensate for extra memory peak (x1.5-x1.9) at flush time.
+    int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * DB_PEAK_USAGE_FACTOR;
     int64_t nTotalSpace = nCoinCacheUsage + std::max<int64_t>(nMempoolSizeMax - nMempoolUsage, 0);
     // The cache is large and we're within 10% and 100 MiB of the limit, but we have time now (not in the middle of a block processing).
-    bool fCacheLarge = mode == FLUSH_STATE_PERIODIC && cacheSize > std::max((9 * nTotalSpace) / 10, nTotalSpace - 100 * 1024 * 1024);
+    bool fCacheLarge = mode == FLUSH_STATE_PERIODIC && cacheSize > std::max((9 * nTotalSpace) / 10, nTotalSpace - MAX_BLOCK_COINSDB_USAGE * 1024 * 1024);
     // The cache is over the limit, we have to write now.
     bool fCacheCritical = mode == FLUSH_STATE_IF_NEEDED && cacheSize > nTotalSpace;
     // It's been a while since we wrote the block index to disk. Do this frequently, so we don't need to redownload after a crash.