diff --git a/src/main/kotlin/com/github/quiltservertools/ledger/database/DatabaseManager.kt b/src/main/kotlin/com/github/quiltservertools/ledger/database/DatabaseManager.kt
index b3346ffb..44654d77 100644
--- a/src/main/kotlin/com/github/quiltservertools/ledger/database/DatabaseManager.kt
+++ b/src/main/kotlin/com/github/quiltservertools/ledger/database/DatabaseManager.kt
@@ -73,6 +73,7 @@ import kotlin.math.ceil
 const val MAX_QUERY_RETRIES = 10
 const val MIN_RETRY_DELAY = 1000L
 const val MAX_RETRY_DELAY = 300_000L
+private const val MAX_EXTRA_DATA_BYTES = 65_535
 
 object DatabaseManager {
 
@@ -456,7 +457,18 @@ object DatabaseManager {
     }
 
     private fun Transaction.insertActions(actions: List<ActionType>) {
-        Tables.Actions.batchInsert(actions, shouldReturnGeneratedValues = false) { action ->
+        val (safe, oversized) = actions.partition {
+            it.extraData == null || it.extraData!!.length <= MAX_EXTRA_DATA_BYTES
+        }
+        oversized.forEach { action ->
+            logWarn(
+                "Skipping action log: extra_data too large (${action.extraData!!.length} chars) " +
+                    "for action ${action.identifier} at " +
+                    "[${action.world} ${action.pos.x} ${action.pos.y} ${action.pos.z}] " +
+                    "by ${action.sourceProfile?.name ?: action.sourceName}",
+            )
+        }
+        Tables.Actions.batchInsert(safe, shouldReturnGeneratedValues = false) { action ->
             this[Tables.Actions.actionIdentifier] = getOrCreateActionId(action.identifier)
             this[Tables.Actions.timestamp] = action.timestamp
             this[Tables.Actions.x] = action.pos.x