Add settings min_free_disk_bytes_to_throw_insert and min_free_disk_ratio_to_throw_insert and update documentation.

docs/en/operations/settings/merge-tree-settings.md

@@ -156,6 +156,26 @@ Default value: 1000.
 
 ClickHouse artificially executes `INSERT` longer (adds ‘sleep’) so that the background merge process can merge parts faster than they are added.
 
+## min_free_disk_bytes_to_throw_insert {#min_free_disk_bytes_to_throw_insert}
+
+The minimum number of bytes that should be free in disk space in order to insert data. If the number of available free bytes - `keep_free_space_bytes` is less than `min_free_disk_bytes_to_throw_insert` then an exception is thrown and the insert is not executed. Note that this setting does not take into account the amount of data that will be written by the `INSERT` operation.
+
+Possible values:
+
+- Any positive integer.
+
+Default value: 0 bytes.
+
+## min_free_disk_ratio_to_throw_insert {#min_free_disk_ratio_to_throw_insert}
+
+The minimum free to total disk space ratio to perform an `INSERT`. The free space is calculated by subtracting `keep_free_space_bytes` from the total available space in disk.
+
+Possible values:
+
+- Float, 0.0 - 1.0
+
+Default value: 0.0
+
 ## inactive_parts_to_throw_insert {#inactive-parts-to-throw-insert}
 
 If the number of inactive parts in a single partition more than the `inactive_parts_to_throw_insert` value, `INSERT` is interrupted with the "Too many inactive parts (N). Parts cleaning are processing significantly slower than inserts" exception.

src/Core/Settings.h

@@ -343,6 +343,8 @@ class IColumn;
     M(Int64, distributed_ddl_task_timeout, 180, "Timeout for DDL query responses from all hosts in cluster. If a ddl request has not been performed on all hosts, a response will contain a timeout error and a request will be executed in an async mode. Negative value means infinite. Zero means async mode.", 0) \
     M(Milliseconds, stream_flush_interval_ms, 7500, "Timeout for flushing data from streaming storages.", 0) \
     M(Milliseconds, stream_poll_timeout_ms, 500, "Timeout for polling data from/to streaming storages.", 0) \
+    M(UInt64, min_free_disk_bytes_to_throw_insert, 0, "Minimum free disk space bytes to throw an insert.", 0) \
+    M(Double, min_free_disk_ratio_to_throw_insert, 0.0, "Minimum free disk space ratio to throw an insert.", 0) \
     \
     M(Bool, final, false, "Query with the FINAL modifier by default. If the engine does not support final, it does not have any effect. On queries with multiple tables final is applied only on those that support it. It also works on distributed tables", 0) \
     \

src/Storages/MergeTree/MergeTreeSettings.h

@@ -99,6 +99,8 @@ struct Settings;
     M(Bool, add_implicit_sign_column_constraint_for_collapsing_engine, false, "If true, add implicit constraint for sign column for CollapsingMergeTree engine.", 0) \
     M(Milliseconds, sleep_before_commit_local_part_in_replicated_table_ms, 0, "For testing. Do not change it.", 0) \
     M(Bool, optimize_row_order, false, "Allow reshuffling of rows during part inserts and merges to improve the compressibility of the new part", 0) \
+    M(UInt64, min_free_disk_bytes_to_throw_insert, 0, "Minimum free disk space bytes to throw an insert.", 0) \
+    M(Double, min_free_disk_ratio_to_throw_insert, 0.0, "Minimum free disk space ratio to throw an insert.", 0) \
     \
     /* Part removal settings. */ \
     M(UInt64, simultaneous_parts_removal_limit, 0, "Maximum number of parts to remove during one CleanupThread iteration (0 means unlimited).", 0) \