GLOBAL_DOUBLE_WRITE_STATUS
GLOBAL_DOUBLE_WRITE_STATUS displays the information about doublewrite files of all instances in the entire cluster.
Name |
Type |
Description |
---|---|---|
node_name |
text |
Instance name |
curr_dwn |
bigint |
Sequence number of the doublewrite file |
curr_start_page |
bigint |
Start page for restoring the doublewrite file |
file_trunc_num |
bigint |
Number of times that the doublewrite file is reused |
file_reset_num |
bigint |
Number of reset times after the doublewrite file is full |
total_writes |
bigint |
Total number of I/Os of the doublewrite file |
low_threshold_writes |
bigint |
Number of I/Os for inefficient doublewrite files. |
high_threshold_writes |
bigint |
Number of I/Os for efficient doublewrite files. |
total_pages |
bigint |
Total number of pages that are flushed to the doublewrite file area |
low_threshold_pages |
bigint |
Number of pages that are flushed with low efficiency |
high_threshold_pages |
bigint |
Number of pages that are flushed with high efficiency |
file_id |
bigint |
ID of the current doublewrite file |
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