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Postgres-XC:http://blog.csdn.net/huguangshanse00/article/details/9636621http://blog.163.com/digoal@126/blog/static/1638770402013332335933/http://blog.... 阅读全文
posted @ 2014-05-30 10:34
bielidefeng
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update/delete .. order by .. limit ..：update aa set b='mmmmmmmmbbbbbbbb' where a>10 order by a limit 1; 会报错：因为update 不能和order by 或limit 联合使用。如果需要使用则需要... 阅读全文
posted @ 2014-05-30 10:34
bielidefeng
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全文检索：http://www.postgresql.org/docs/9.3/interactive/textsearch.htmlpostgres 切词:http://blog.163.com/digoal@126/blog/static/163877040201422410175698/ts_... 阅读全文
posted @ 2014-05-30 10:34
bielidefeng
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http://www.postgresql.org/docs/9.3/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-DIAGNOSTICSEXECUTE format('UPDATE tbl SET %I = $1 WHERE key = $2'... 阅读全文
posted @ 2014-05-30 10:34
bielidefeng
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http://docs.oracle.com/cd/E19253-01/819-6951/index.htmlhttp://lovesoo.org/linux-sar-command-detailed.htmlhttp://www.live-in.org/archives/922.htmlfree：... 阅读全文
posted @ 2014-05-30 10:34
bielidefeng
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http://my.oschina.net/Kenyon/blog/108850update tuple时会新增一个tuple然后将其隐藏。delete tuple时会隐藏tuple。postgres=# truncate table mmpostgres-# ;TRUNCATE TABLEpost... 阅读全文
posted @ 2014-05-30 10:33
bielidefeng
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bgwriter:http://book.51cto.com/art/201201/313208.htmautovacuum:http://book.51cto.com/art/201201/313211.htmhttp://www.postgresql.org/docs/9.2/static/ro... 阅读全文
posted @ 2014-05-30 10:33
bielidefeng
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http://blog.163.com/digoal@126/blog/static/1638770402013527920474/create extension pgstattuple;create extension pg_freespacemap;查看表文件路径 select * from ... 阅读全文
posted @ 2014-05-30 10:33
bielidefeng
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page:是对block的描述，该如何存储8K数据。以下是Page的结构：http://blog.chinaunix.net/uid-24774106-id-3764606.html查看page:http://www.postgresql.org/docs/9.2/static/pageinspec... 阅读全文
posted @ 2014-05-30 10:33
bielidefeng
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checkpoint参数描述：checkpoint的时候会将所有的脏数据都flush到磁盘上checkpoint_timeout：两次checkpoint间隔时长checkpoint_segments:两次checkpoint间隔最大的xlog日志文件数量(指的是pg_xlog下的文件：000000... 阅读全文
posted @ 2014-05-30 10:33
bielidefeng
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