bgwriter_all_percent
To reduce the amount of work that will be needed at checkpoint time, the background writer also does a circular scan through the entire buffer pool, writing buffers that are found to be dirty. In each round, it examines up to bgwriter_all_percent of the buffers for this purpose. The default value is 0.333 (0.333% of the total number of shared buffers). With the default bgwriter_delay setting, this will allow the entire shared buffer pool to be scanned about once per minute. This parameter can only be set in the postgresql.conf file or on the server command line.
英文手册覆盖始于 PostgreSQL 7.4. 来源历史与运行验证各自保留独立版本边界。
当前阅读 PG 8.2·选择有来源记录的版本
此版本暂无所选语言的定义，以下显示原始英文内容。
- boot val
- 未知
- category
- Background Writer
- context
- 未知
- documented
- true
- enumvals
- 未知
- extra desc
- 未知
- lang
- en
- max val
- 未知
- metadata version
- 未知
- min val
- 未知
- name
- bgwriter_all_percent
- short desc
- 未知
- source
- english-manual
- unit
- 未知
- vartype
- real
版本定义 PG 8.2
To reduce the amount of work that will be needed at checkpoint time, the background writer also does a circular scan through the entire buffer pool, writing buffers that are found to be dirty. In each round, it examines up to bgwriter_all_percent of the buffers for this purpose. The default value is 0.333 (0.333% of the total number of shared buffers). With the default bgwriter_delay setting, this will allow the entire shared buffer pool to be scanned about once per minute. This parameter can only be set in the postgresql.conf file or on the server command line.
比较版本
来源引用
定义来源
center · PostgreSQL 8.2 · english-manuals:352c41f450552819bff54df127645a9eb2bc15211696723c96083da9acdbefe8
正文语言: en · english-manuals:352c41f450552819bff54df127645a9eb2bc15211696723c96083da9acdbefe8