Performance Schema Summary Tables The amount of network data transferred in the current state, in bytes. The current actual speed of data transfer, in bytes per second. This value may differ from the requested maximum data transfer rate defined by  clone_max_data_bandwidth . The current speed of network transfer in bytes per second. The  clone_progress  table is read-only. DDL, including  TRUNCATE TABLE , is not permitted. Summary tables provide aggregated information for terminated events over time. The tables in this group summarize event data in different ways. Each summary table has grouping columns that determine how to group the data to be aggregated, and summary columns that contain the aggregated values. Tables that summarize events in similar ways often have similar sets of summary columns and differ only in the grouping columns used to determine how events are aggregated. Summary tables can be truncated with  TRUNCATE TABLE . Generally, the effect is to reset the summary columns to 0 or  NULL , not to remove rows. This enables you to clear collected values and restart aggregation. That might be useful, for example, after you have made a runtime configuration change. Exceptions to this truncation behavior are noted in individual summary table sections. 5048 27.12.20 Performance Schema Summary Tables • DATA_SPEED • NETWORK_SPEED Table Name Description events_waits_summary_by_account_by_event_name Wait events per account and event name events_waits_summary_by_host_by_event_name Wait events per host name and event name events_waits_summary_by_instance Wait events per instance events_waits_summary_by_thread_by_event_name Wait events per thread and event name events_waits_summary_by_user_by_event_name Wait events per user name and event name events_waits_summary_global_by_event_name Wait events per event name Table Name Description events_stages_summary_by_account_by_event_name Stage events per account and event name events_stages_summary_by_host_by_event_name Stage events per host name and event name events_stages_summary_by_thread_by_event_name Stage waits per thread and event name events_stages_summary_by_user_by_event_name Stage events per user name and event name events_stages_summary_global_by_event_name Stage waits per event name Table 27.5 Performance Schema Wait Event Summary Tables Table 27.6 Performance Schema Stage Event Summary Tables Wait Event Summaries Stage Summaries