MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
These views summarize memory use, grouped by user. By default, rows are sorted by descending amount of memory used.
The
memory_by_user_by_current_bytes
and
x$memory_by_user_by_current_bytes
views have these columns:
user
The client user name. Rows for which the
USER column in the underlying
Performance Schema table is NULL are
assumed to be for background threads and are reported with
a host name of background.
current_count_used
The current number of allocated memory blocks that have not been freed yet for the user.
current_allocated
The current number of allocated bytes that have not been freed yet for the user.
current_avg_alloc
The current number of allocated bytes per memory block for the user.
current_max_alloc
The largest single current memory allocation in bytes for the user.
total_allocated
The total memory allocation in bytes for the user.