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unarist 0129f5eada Optimize FixReblogsInFeeds migration (#5538) ... We have changed how we store reblogs in the redis for bigint IDs. This process is done by 1) scan all entries in users feed, and 2) re-store reblogs by 3 write commands. However, this operation is really slow for large instances. e.g. 1hrs on friends.nico (w/ 50k users). So I have tried below tweaks. * It checked non-reblogs by `entry[0] == entry[1]`, but this condition won't work because `entry[0]` is String while `entry[1]` is Float. Changing `entry[0].to_i == entry[1]` seems work. -> about 4-20x faster (feed with less reblogs will be faster) * Write operations can be batched by pipeline -> about 6x faster * Wrap operation by Lua script and execute by EVALSHA command. This really reduces packets between Ruby and Redis. -> about 3x faster I've taken Lua script way, though doing other optimizations may be enough.		7 years ago
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migrate	Optimize FixReblogsInFeeds migration (#5538)	7 years ago
schema.rb	foreign_key, non-nullable, dependent: destroy in account_moderation_notes (#5294)	7 years ago
seeds.rb	Fix db:seed - only run some validations when the field was changed (#3592)	8 years ago