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# frozen_string_literal: true
module Gitlab
module Database
module Partitioning
class PartitionMonitoring
attr_reader :models
def initialize(models = PartitionManager.models)
@models = models
end
def report_metrics
models.each do |model|
strategy = model.partitioning_strategy
gauge_present.set({ table: model.table_name }, strategy.current_partitions.size)
gauge_missing.set({ table: model.table_name }, strategy.missing_partitions.size)
gauge_extra.set({ table: model.table_name }, strategy.extra_partitions.size)
end
end
private
def gauge_present
@gauge_present ||= Gitlab::Metrics.gauge(:db_partitions_present, 'Number of database partitions present')
end
def gauge_missing
@gauge_missing ||= Gitlab::Metrics.gauge(:db_partitions_missing, 'Number of database partitions currently expected, but not present')
end
def gauge_extra
@gauge_extra ||= Gitlab::Metrics.gauge(:db_partitions_extra, 'Number of database partitions currently attached to tables, but outside of their retention window and scheduled to be dropped')
end
end
end
end
end
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