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fix the problem that expired data was not recycled timely due to slow gc speed (#4224) #4255

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merged 2 commits into from
Apr 21, 2022
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fix the problem that expired data was not recycled timely due to slow gc speed (#4224) #4255

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cee7db4
fix dt background gc speed too slow to remove expired data timely
lidezhu Mar 11, 2022
fabf1a3
Merge branch 'release-5.4' into cherry-pick-4224-to-release-5.4
lidezhu Apr 21, 2022
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4 changes: 2 additions & 2 deletions dbms/src/Interpreters/Settings.h
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Expand Up @@ -257,8 +257,8 @@ struct Settings
M(SettingUInt64, dt_segment_delta_small_pack_size, 8388608, "Determine whether a pack in delta is small or not. 8MB by default.") \
M(SettingUInt64, dt_segment_stable_pack_rows, DEFAULT_MERGE_BLOCK_SIZE, "Expected stable pack rows in DeltaTree Engine.") \
M(SettingFloat, dt_segment_wait_duration_factor, 1, "The factor of wait duration in a write stall.") \
M(SettingUInt64, dt_bg_gc_check_interval, 600, "Background gc thread check interval, the unit is second.") \
M(SettingInt64, dt_bg_gc_max_segments_to_check_every_round, 15, "Max segments to check in every gc round, value less than or equal to 0 means gc no segments.") \
M(SettingUInt64, dt_bg_gc_check_interval, 5, "Background gc thread check interval, the unit is second.") \
M(SettingInt64, dt_bg_gc_max_segments_to_check_every_round, 100, "Max segments to check in every gc round, value less than or equal to 0 means gc no segments.") \
M(SettingFloat, dt_bg_gc_ratio_threhold_to_trigger_gc, 1.2, "Trigger segment's gc when the ratio of invalid version exceed this threhold. Values smaller than or equal to 1.0 means gc all " \
"segments") \
M(SettingFloat, dt_bg_gc_delta_delete_ratio_to_trigger_gc, 0.3, "Trigger segment's gc when the ratio of delta delete range to stable exceeds this ratio.") \
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