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8000 chore(server): Allow using background fibers for DEBUG OBJHIST by dranikpg · Pull Request #5933 · dragonflydb/dragonfly · GitHub
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@dranikpg dranikpg commented Oct 20, 2025
  • Allows using background fibers with DEBUG OBJHIST
  • Changes base behaviour from counting operations to using GetRunningTimeCycles

-> Should make it safer to run it on busy datastores

I though of adding the same functionality to huffman compuations, but they're quite stateful/conditional, so it would've required more work 😞

Signed-off-by: Vladislav Oleshko <vlad@dragonflydb.io>
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dranikpg commented Oct 20, 2025

Tested it with DEBUG POPULATE A LOT and running memtier traffic. With background fibers QPS drops <5%, regular drops ~20%. Operation takes 21s vs 15s

(Remember that scheduler background fiber settings can be chagned at runtime as well)

config_registry.RegisterMutable("max_segment_to_consider");
config_registry.RegisterMutable(" 8000 pipeline_squash");
config_registry.RegisterMutable("lua_mem_gc_threshold");
config_registry.RegisterMutable("background_debug_jobs");
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can you please add same support for "dfly expire" ? maybe rename background_debug_jobs to background_jobs ?

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DFLY EXPIRE is a transactional command. I can make it non-transactional and move the traversal to some common header, but I'd suggest to do so in a different PR

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we should make it non-transactional.

Co-authored-by: Roman Gershman <romange@gmail.com>
Signed-off-by: Vladislav <vladislav.oleshko@gmail.com>
@dranikpg dranikpg marked this pull request as ready for review October 21, 2025 10:56
@dranikpg dranikpg requested a review from romange October 21, 2025 10:57
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romange commented Oct 21, 2025

LGTM, make sure tests pass

@dranikpg dranikpg merged commit ad0684b into dragonflydb:main Oct 22, 2025
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