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MySQL Globalization
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Thedisk_write_speed_aggregate table provides aggregated information about the speed of disk writes during LCP, backup, and restore operations.
Thedisk_write_speed_aggregate table contains the following columns:
node_idNode ID of this node
thr_noThread ID of this LDM thread
backup_lcp_speed_last_secNumber of bytes written to disk by backup and LCP processes in the last second
redo_speed_last_secNumber of bytes written to REDO log in the last second
backup_lcp_speed_last_10secNumber of bytes written to disk by backup and LCP processes per second, averaged over the last 10 seconds
redo_speed_last_10secNumber of bytes written to REDO log per second, averaged over the last 10 seconds
std_dev_backup_lcp_speed_last_10secStandard deviation in number of bytes written to disk by backup and LCP processes per second, averaged over the last 10 seconds
std_dev_redo_speed_last_10secStandard deviation in number of bytes written to REDO log per second, averaged over the last 10 seconds
backup_lcp_speed_last_60secNumber of bytes written to disk by backup and LCP processes per second, averaged over the last 60 seconds
redo_speed_last_60secNumber of bytes written to REDO log per second, averaged over the last 10 seconds
std_dev_backup_lcp_speed_last_60secStandard deviation in number of bytes written to disk by backup and LCP processes per second, averaged over the last 60 seconds
std_dev_redo_speed_last_60secStandard deviation in number of bytes written to REDO log per second, averaged over the last 60 seconds
slowdowns_due_to_io_lagNumber of seconds since last node start that disk writes were slowed due to REDO log I/O lag
slowdowns_due_to_high_cpuNumber of seconds since last node start that disk writes were slowed due to high CPU usage
disk_write_speed_set_to_minNumber of seconds since last node start that disk write speed was set to minimum
current_target_disk_write_speedActual speed of disk writes per LDM thread (aggregated)
PDF (A4) - 43.4Mb
Man Pages (TGZ) - 297.2Kb
Man Pages (Zip) - 402.4Kb
Info (Gzip) - 4.3Mb
Info (Zip) - 4.3Mb
MySQL Globalization
MySQL Information Schema
MySQL Installation Guide
Security in MySQL
Starting and Stopping MySQL
MySQL and Linux/Unix
MySQL and Windows
MySQL and macOS
MySQL and Solaris
Building MySQL from Source
MySQL Restrictions and Limitations
MySQL Partitioning
MySQL Tutorial
MySQL Performance Schema
MySQL Replication
Using the MySQL Yum Repository
MySQL NDB Cluster 8.0