Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
Situations in which Oracle Database may perform direct path reads include:
-
Execution of a CREATE TABLE AS SELECT statement
-
Execution of an ALTER REBUILD or ALTER MOVE statement
-
Reads from a temporary tablespace
-
Parallel queries
-
Reads from a LOB segment
Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
Direct Path Reads
In a direct path read, the database reads buffers from disk directly into the PGA, bypassing the SGA entirely.
The following figure shows the difference between scattered and sequential reads, which store buffers in the SGA, and direct path reads.
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。
