Global Hash Partitioned Indexes

全局哈希分区索引通过分散索引竞争来提升性能,特别是在索引单调增长的情况下,大部分插入操作仅发生在索引的右侧边缘。
Global hash partitioned indexes improve performance by spreading out contention
when the index is monotonically growing. In other words, most of the index insertions
occur only on the right edge of an index.[@more@]

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/10599713/viewspace-1002166/,如需转载,请注明出处,否则将追究法律责任。

转载于:http://blog.itpub.net/10599713/viewspace-1002166/

ipnmdbst=# \d+ NHM_AAA_KPI_HOUR; Partitioned table "nhm.nhm_aaa_kpi_hour" Column | Type | Collation | Nullable | Default | Storage | Stats target | Description -------------+----------------------------+-----------+----------+-------------+----------+--------------+------------- time_stamp | date | | | | plain | | city | character varying(64 char) | | | | extended | | utility | numeric | | | | main | | insert_time | date | | | "sysdate"() | plain | | Partition key: RANGE (time_stamp) Indexes: "nhm_aaa_kpi_hour_rowid_key" UNIQUE CONSTRAINT, btree ("rowid") INCLUDE (tableoid) GLOBAL Partitions: nhm_aaa_kpi_hour_p20240625 FOR VALUES FROM (MINVALUE) TO ('2024-06-26 00:00:00'), nhm_aaa_kpi_hour_p20240626 FOR VALUES FROM ('2024-06-26 00:00:00') TO ('2024-06-27 00:00:00'), nhm_aaa_kpi_hour_p20240627 FOR VALUES FROM ('2024-06-27 00:00:00') TO ('2024-06-28 00:00:00'), nhm_aaa_kpi_hour_p20240628 FOR VALUES FROM ('2024-06-28 00:00:00') TO ('2024-06-29 00:00:00'), nhm_aaa_kpi_hour_p20240629 FOR VALUES FROM ('2024-06-29 00:00:00') TO ('2024-06-30 00:00:00'), nhm_aaa_kpi_hour_p20240630 FOR VALUES FROM ('2024-06-30 00:00:00') TO ('2024-07-01 00:00:00'), nhm_aaa_kpi_hour_p20240701 FOR VALUES FROM ('2024-07-01 00:00:00') TO ('2024-07-02 00:00:00'), nhm_aaa_kpi_hour_p20240702 FOR VALUES FROM ('2024-07-02 00:00:00') TO ('2024-07-03 00:00:00'), nhm_aaa_kpi_hour_p20240703 FOR VALUES FROM ('2024-07-03 00:00:00') TO ('2024-07-04 00:00:00'), nhm_aaa_kpi_hour_p20240704 FOR VALUES FROM ('2024-07-04 00:00:00') TO ('2024-07-05 00:00:00'), nhm_aaa_kpi_hour_p20240705 FOR VALUES FROM ('2024-07-05 00:00:00') TO ('2024-07-06 00:00:00'), nhm_aaa_kpi_hour_p20240706 FOR VALUES FROM ('2024-07-06 00:00:00') TO ('2024-07-07 00:00:00'),这属于几级分区
最新发布
12-20
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值