50 lines
1.7 KiB
Ruby
50 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module QueryAnalyzers
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# The purpose of this analyzer is to observe via prometheus metrics
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# all unique schemas observed on a given connection
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#
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# This effectively allows to do sample 1% or 0.01% of queries hitting
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# system and observe if on a given connection we observe queries that
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# are misaligned (`ci_replica` sees queries doing accessing only `gitlab_main`)
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#
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class GitlabSchemasMetrics < Base
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class << self
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def enabled?
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::Feature::FlipperFeature.table_exists? &&
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Feature.enabled?(:query_analyzer_gitlab_schema_metrics, type: :ops)
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end
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def analyze(parsed)
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# This analyzer requires the PgQuery parsed query to be present
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return unless parsed.pg
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db_config_name = ::Gitlab::Database.db_config_name(parsed.connection)
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return unless db_config_name
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gitlab_schemas = ::Gitlab::Database::GitlabSchema.table_schemas!(parsed.pg.tables)
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return if gitlab_schemas.empty?
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# to reduce amount of labels sort schemas used
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gitlab_schemas = gitlab_schemas.to_a.sort.join(",")
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schemas_metrics.increment({
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gitlab_schemas: gitlab_schemas,
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db_config_name: db_config_name
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})
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end
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def schemas_metrics
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@schemas_metrics ||= ::Gitlab::Metrics.counter(
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:gitlab_database_decomposition_gitlab_schemas_used,
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'The number of observed schemas dependent on connection'
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)
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end
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end
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end
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end
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end
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end
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