Rechercher dans le manuel MySQL
22.5.10.18 The ndbinfo disk_write_speed_aggregate Table
The disk_write_speed_aggregate
table provides
aggregated information about the speed of disk writes during
LCP, backup, and restore operations.
The following table provides information about the columns in
the disk_write_speed_aggregate
table. For
each column, the table shows the name, data type, and a brief
description. Additional information can be found in the notes
following the table.
Table 22.392 Columns in the disk_write_speed_aggregate table
Column Name | Type | Description |
---|---|---|
node_id | integer | Node ID of this node |
thr_no | integer | Thread ID of this LDM thread |
backup_lcp_speed_last_sec | integer | Number of bytes written to disk by backup and LCP processes in the last second |
redo_speed_last_sec | integer | Number of bytes written to REDO log in the last second |
backup_lcp_speed_last_10sec | integer | Number of bytes written to disk by backup and LCP processes per second, averaged over the last 10 seconds |
redo_speed_last_10sec | integer | Number of bytes written to REDO log per second, averaged over the last 10 seconds |
std_dev_backup_lcp_speed_last_10sec | integer | Standard 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_10sec | integer | Standard deviation in number of bytes written to REDO log per second, averaged over the last 10 seconds |
backup_lcp_speed_last_60sec | integer | Number of bytes written to disk by backup and LCP processes per second, averaged over the last 60 seconds |
redo_speed_last_60sec | integer | Number of bytes written to REDO log per second, averaged over the last 10 seconds |
std_dev_backup_lcp_speed_last_60sec | integer | Standard 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_60sec | integer | Standard deviation in number of bytes written to REDO log per second, averaged over the last 60 seconds |
slowdowns_due_to_io_lag | integer | Number of seconds since last node start that disk writes were slowed due to REDO log I/O lag |
slowdowns_due_to_high_cpu | integer | Number of seconds since last node start that disk writes were slowed due to high CPU usage |
disk_write_speed_set_to_min | integer | Number of seconds since last node start that disk write speed was set to minimum |
current_target_disk_write_speed | integer | Actual speed of disk writes per LDM thread (aggregated) |
Traduction non disponible
Le manuel MySQL n'est pas encore traduit en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.
Document créé le 26/06/2006, dernière modification le 26/10/2018
Source du document imprimé : https://www.gaudry.be/mysql-rf-mysql-cluster-ndbinfo-disk-write-speed-aggregate.html
L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.
Références
Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.