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DBA_HIGH_WATER_MARK_STATISTICS视图

原创 IT职场 作者:studycow 时间:2010-02-24 11:57:27 0 删除 编辑
从Oracle10g开始,增加了DBA_HIGH_WATER_MARK_STATISTICS视图,用以记录段的HWM信息,Oracle文档对这个视力的描述如下:[@more@]

DBA_HIGH_WATER_MARK_STATISTICS

DBA_HIGH_WATER_MARK_STATISTICS displays information about database high-watermark statistics.

ColumnDatatypeNULLDescription
DBIDNUMBERNOT NULLIdentifier of the database for which the high-watermark statistics are tracked
NAMEVARCHAR2(64)NOT NULLName of the high-watermark statistic (See Table 4-2)
VERSIONVARCHAR2(17)NOT NULLDatabase version in which the high-watermarks were tracked
HIGHWATERNUMBER Highest value of the statistic seen at sampling time
LAST_VALUENUMBER Value of the statistic at the last sample time
DESCRIPTIONVARCHAR2(128) Description of the high-watermark statistics (See Table 4-2)

Table 4-2 DBA_HIGH_WATER_MARK_STATISTICS Statistics

NameDescription

USER_TABLES

Number of User Tables

SEGMENT_SIZE

Size of Largest Segment (Bytes)

PART_TABLES

Maximum Number of Partitions belonging to an User Table

PART_INDEXES

Maximum Number of Partitions belonging to an User Index

USER_INDEXES

Number of User Indexes

SESSIONS

Maximum Number of Concurrent Sessions seen in the database

DB_SIZE

Maximum Size of the Database (Bytes)

DATAFILES

Maximum Number of Datafiles

TABLESPACES

Maximum Number of Tablespaces

CPU_COUNT

Maximum Number of CPUs

QUERY_LENGTH

Maximum Query Length

SERVICES

Maximum Number of Services

来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/7839206/viewspace-1031404/ ,如需转载,请注明出处,否则将追究法律责任。

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