MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
These views summarize memory use, grouped by host. By default, rows are sorted by descending amount of memory used.
The
memory_by_host_by_current_bytes
and
x$memory_by_host_by_current_bytes
views have these columns:
host
The host from which the client connected. Rows for which
the HOST 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 host.
current_allocated
The current number of allocated bytes that have not been freed yet for the host.
current_avg_alloc
The current number of allocated bytes per memory block for the host.
current_max_alloc
The largest single current memory allocation in bytes for the host.
total_allocated
The total memory allocation in bytes for the host.