forked from YokaiRick/akkoma
85 lines
2.2 KiB
Elixir
85 lines
2.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Telemetry.Logger do
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@moduledoc "Transforms Pleroma telemetry events to logs"
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require Logger
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@events [
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[:pleroma, :repo, :query]
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]
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def attach do
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:telemetry.attach_many(
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"pleroma-logger",
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@events,
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&Pleroma.Telemetry.Logger.handle_event/4,
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[]
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)
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end
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# Passing anonymous functions instead of strings to logger is intentional,
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# that way strings won't be concatenated if the message is going to be thrown
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# out anyway due to higher log level configured
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def handle_event(
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[:pleroma, :repo, :query] = _name,
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%{query_time: query_time} = measurements,
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%{source: source} = metadata,
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config
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) do
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logging_config = Pleroma.Config.get([:telemetry, :slow_queries_logging], [])
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if logging_config[:enabled] &&
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logging_config[:min_duration] &&
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query_time > logging_config[:min_duration] and
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(is_nil(logging_config[:exclude_sources]) or
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source not in logging_config[:exclude_sources]) do
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log_slow_query(measurements, metadata, config)
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else
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:ok
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end
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end
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defp log_slow_query(
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%{query_time: query_time} = _measurements,
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%{source: _source, query: query, params: query_params, repo: repo} = _metadata,
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_config
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) do
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sql_explain =
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with {:ok, %{rows: explain_result_rows}} <-
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repo.query("EXPLAIN " <> query, query_params, log: false) do
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Enum.map_join(explain_result_rows, "\n", & &1)
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end
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{:current_stacktrace, stacktrace} = Process.info(self(), :current_stacktrace)
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pleroma_stacktrace =
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Enum.filter(stacktrace, fn
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{__MODULE__, _, _, _} ->
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false
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{mod, _, _, _} ->
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mod
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|> to_string()
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|> String.starts_with?("Elixir.Pleroma.")
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end)
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Logger.warn(fn ->
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"""
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Slow query!
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Total time: #{round(query_time / 1_000)} ms
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#{query}
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#{inspect(query_params, limit: :infinity)}
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#{sql_explain}
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#{Exception.format_stacktrace(pleroma_stacktrace)}
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"""
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end)
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end
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end
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