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db: add large_row_fail_threshold_mb config option

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Reject writes targeting a row whose on-disk size already exceeds
this threshold (MB).  Code default is 0 (disabled) for existing
clusters; scylla.yaml ships 20 for new deployments.
This commit is contained in:
Taras Veretilnyk
2026-05-13 13:47:32 +02:00
parent 64fc53cb7c
commit ca2b8352ac
3 changed files with 8 additions and 0 deletions
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4
conf/scylla.yaml
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@@ -432,6 +432,10 @@ large_partition_fail_threshold_mb: 2000
# Log a warning when writing rows larger than this value
# compaction_large_row_warning_threshold_mb: 10
# Reject writes to rows whose on-disk size exceeds this threshold (MB).
# Set to 0 to disable.
large_row_fail_threshold_mb: 20
# Log a warning when writing cells larger than this value
# compaction_large_cell_warning_threshold_mb: 1

3
db/config.cc
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@@ -792,6 +792,9 @@ db::config::config(std::shared_ptr<db::extensions> exts)
, rows_count_fail_threshold(this, "rows_count_fail_threshold", liveness::LiveUpdate, value_status::Used, 0,
"Reject writes targeting a partition whose on-disk row count already exceeds this threshold, as recorded in any SSTable's large data records. "
"Set to 0 to disable.")
, large_row_fail_threshold_mb(this, "large_row_fail_threshold_mb", liveness::LiveUpdate, value_status::Used, 0,
"Reject writes targeting a partition that contains any row whose on-disk size already exceeds this threshold in MB, as recorded in any SSTable's large data records. "
"Set to 0 to disable.")
, compaction_rows_count_warning_threshold(this, "compaction_rows_count_warning_threshold", liveness::LiveUpdate, value_status::Used, 100000,
"Log a warning when writing a number of rows larger than this value.")
, compaction_collection_elements_count_warning_threshold(this, "compaction_collection_elements_count_warning_threshold", liveness::LiveUpdate, value_status::Used, 10000,

1
db/config.hh
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@@ -227,6 +227,7 @@ public:
named_value<uint32_t> compaction_large_cell_warning_threshold_mb;
named_value<uint32_t> large_partition_fail_threshold_mb;
named_value<uint32_t> rows_count_fail_threshold;
named_value<uint32_t> large_row_fail_threshold_mb;
named_value<uint32_t> compaction_rows_count_warning_threshold;
named_value<uint32_t> compaction_collection_elements_count_warning_threshold;
named_value<uint32_t> compaction_large_data_records_per_sstable;