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Change history for the MySQL sys schema

1.1.0 (04/09/2014)

Improvements

  • Added host summary views, which have the same structure as the user summary views, but aggregated by host instead (Contributed by Arnaud Adant)

    • host_summary
    • host_summary_by_file_io_type
    • host_summary_by_file_io
    • host_summary_by_statement_type
    • host_summary_by_statement_latency
    • host_summary_by_stages
    • waits_by_host_by_latency

  • Added functions which return instruments are either enabled, or timed by default (#15) (Contributed by Jesper Wisborg Krogh)

    • ps_is_instrument_default_enabled
    • ps_is_instrument_default_timed

  • Added a ps_thread_id function, which returns the thread_id value exposed within performance_schema for the current connection (Contributed by Jesper Wisborg Krogh)

  • Improved each of the user specific views to return aggregate values for background threads, instead of ignoring them (Contributed by Joe Grasse)

  • Optimized the schema_table_statistics and schema_table_statistics_with_buffer views, to use a new view that will get materialized (x$ps_schema_table_statistics_io), along with the changes to the RETURN types for extract_schema_from_file_name and extract_table_from_file_name, this results in a significant performance improvement - in one test changing the run time from 14 minutes to 20 seconds. (Conceived by Roy Lyseng, Mark Leith and Jesper Wisborg Krogh, implemented and contributed by Jesper Wisborg Krogh)

Bug Fixes

  • Removed unintentially committed sys_56_rds.sql file (See Issue #5, which is still outstanding)
  • Fixed the ps_trace_statement_digest and ps_trace_thread procedures to properly set sql_log_bin, and reset the thread INSTRUMENTED value correctly (Contributed by Jesper Wisborg Krogh)
  • Removed various sql_log_bin disabling from other procedures that no longer require it - DML against the performance_schema data is no longer replicated (Contributed by Jesper Wisborg Krogh)
  • Fixed EXPLAIN within ps_trace_statement_digest procedure (Contributed by Jesper Wisborg Krogh)
  • Fixed the datatype for the thd_id variable within the ps_thread_stack procedure (Contributed by Jesper Wisborg Krogh)
  • Fixed datatypes used for temporary tables within the ps_trace_statement_digest procedure (Contributed by Jesper Wisborg Krogh)
  • Fixed the RETURN datatype extract_schema_from_file_name and extract_table_from_file_name to return a VARCHAR(64) (Contributed by Jesper Wisborg Krogh)
  • Added events_transactions_current to the default enabled consumers in 5.7 (#25)

1.0.1 (23/05/2014)

Improvements

  • Added procedures to enable / disable Performance Schema consumers. (Contributed by the MySQL QA Team)

    • ps_setup_disable_consumers(<LIKE string>) allows disabling any consumers matching the LIKE string.
    • ps_setup_enable_consumers(<LIKE string>) allows enabling any consumers matching the LIKE string.

  • Added procedures to show both enabled and disbled consumers or instruments individually, these are more useful for tooling than the ps_setup_show_enabled/ps_setup_show_disabled procedures which show all configuration in multiple result sets. (Contributed by the MySQL QA Team)

    • ps_setup_show_disabled_consumers shows only disabled consumers.
    • ps_setup_show_disabled_instruments shows only disabled instruments.
    • ps_setup_show_enabled_consumers shows only enabled consumers.
    • ps_setup_show_enabled_instruments shows only enabled instruments.

Bug Fixes

  • Running the installation scripts sometimes failed because of the comment format. (#1) (Contributed by Joe Grasse)
  • Some views did not work with the ERROR_FOR_DIVISION_BY_ZERO SQL mode. (#6) (Contributed by Joe Grasse)
  • On Windows the ps_thread_stack() stored function failed to escape file path backslashes correctly within the JSON output.

1.0.0 (11/04/2014)