Database Interval (PI_PIDB)
- Organization of this page
Function
The Database Interval (PI_PIDB) record stores performance data, taken at specific intervals, about a database.
Default and changeable values
Item |
Default value |
Changeable |
---|---|---|
Collection Interval |
3600 |
Y |
Collection Offset |
10 |
Y |
Log |
No |
Y |
LOGIF |
(Blank) |
Y |
Over 10 Sec Collection Time |
No |
N |
ODBC key fields
None
Lifetime
From the creation to the deletion of a database
Record size
-
Fixed part: 1, 406 bytes
-
Variable part: 0 bytes
Fields
PFM - View name (PFM - Manager name) |
Description |
Summary |
Format |
Delta |
Supported version |
Data source |
---|---|---|---|---|---|---|
Archive Change # (ARCHIVE_CHANGE_NUM) |
Last archived system change number (SCN)#1 |
COPY |
double |
No |
All |
V$DATABASE.ARCHIVE_CHANGE# |
Blocks (BLOCKS) |
Size of the database in Oracle blocks#2 |
AVG |
double |
No |
All |
|
Checkpoint Change # (CHECKPOINT_CHANGE_NUM) |
System change number (SCN) at the last checkpoint#1 |
COPY |
double |
No |
All |
V$DATABASE.CHECKPOINT_CHANGE# |
Created (CREATED) |
Creation date #1 |
COPY |
string(20) |
No |
All |
V$DATABASE.CREATED |
DB Files % (PERCENT_DB_FILES) |
Percentage ratio of the data files to the DB_FILES parameter value in the init.ora file #2 |
AVG |
double |
No |
All |
|
DB Name (NAME) |
Database name #1 |
COPY |
string(9) |
No |
All |
V$DATABASE.NAME |
Datafiles (DATAFILES) |
Number of data files #2 |
AVG |
ulong |
No |
All |
|
Extents (EXTENTS) |
Correct values cannot be collected in this field. Number of extents. #2 |
AVG |
double |
No |
All |
|
Free % (PERCENT_FREE) |
Percentage ratio of free space #2 |
AVG |
double |
No |
All |
|
Free Change (FREE_CHANGE) |
Change to the free space in bytes |
AVG |
double |
No |
All |
|
Free Extents (FREE_EXTENTS) |
Number of free extents #2 |
AVG |
double |
No |
All |
|
Free Mbytes (FREE_BYTES) |
Size of free space in megabytes #2 |
AVG |
double |
No |
All |
|
High Max Extent (HIGH_MAX_EXTENTS) |
Correct values cannot be collected in this field. Number of segments whose PCT_MAX_EXTENTS value exceeds 90%. #2 |
HILO |
ulong |
No |
All |
|
I/O Ops/sec (IO_RATE) |
Number of I/O operations per second #2 |
AVG |
double |
No |
All |
(SUM(V$FILESTAT.PHYRDS) + SUM(V$FILESTAT.PHYWRTS)) / seconds in interval |
Links (LINKS) |
This field is not supported. Number of database links. #2 |
AVG |
long |
No |
Not supported |
COUNT(V$DBLINK) |
Links In Tran (LINKS_IN_TRAN) |
This field is not supported. Number of current database links in the transaction. #2 |
AVG |
short |
No |
Not supported |
SUM(V$DBLINK.IN_TRANSACTION) |
Links Logged On (LINKS_LOGGED_ON) |
This field is not supported. Number of database links currently logged on. #2 |
AVG |
short |
No |
Not supported |
SUM(V$DBLINK.LOGGED_ON) |
Links Open Cursors (LINKS_OPEN_CURSORS) |
This field is not supported. Number of database links with open cursor. #2 |
AVG |
short |
No |
Not supported |
SUM(V$DBLINK.OPEN_CURSORS) |
Log Files % (PERCENT_LOG_FILES) |
Percentage ratio of REDO log files to the LOG_FILES parameter value in the init.ora file #2 Correct values cannot be collected in this field (always 0). |
AVG |
double |
No |
All |
-- |
Log Mode (LOG_MODE) |
Archive log mode. Valid values are NOARCHIVE, LOG, and ARCHIVELOG. #1 |
COPY |
string(12) |
No |
All |
V$DATABASE.LOG_MODE |
Mbytes (BYTES) |
Size of a database file in megabytes #2 |
AVG |
double |
No |
All |
|
Next Alloc Fails (NEXT_ALLOC_FAILS) |
Correct values cannot be collected in this field. Number of segments that exceed the maximum fragments permitted for NEXT_EXTENT. For locally managed temporary tablespaces, always 0.#2 |
HILO |
ulong |
No |
All |
COUNT(DBA_SEGMENTS) where NEXT_EXTENT > MAX(FET$.LENGTH) * DB_BLOCK_SIZE |
Overextended (OVEREXTENDED) |
Correct values cannot be collected in this field. Number of segments with more than five extents. #2 |
HILO |
ulong |
No |
All |
|
Physical Blocks Read (PHYSICAL_BLOCKS_READ) |
Number of physical block read operations #2 |
AVG |
double |
Yes |
All |
SUM(V$FILESTAT.PHYBLKRD) |
Physical Blocks Written (PHYSICAL_BLOCKS_WRITTEN) |
Number of physical block write operations #2 |
AVG |
double |
Yes |
All |
SUM(V$FILESTAT.PHYBLKWRT) |
Physical Reads (PHYSICAL_READS) |
Number of physical read operations that were completed #2 |
AVG |
double |
Yes |
All |
SUM(V$FILESTAT.PHYRDS) |
Physical Writes (PHYSICAL_WRITES) |
Number of physical write operations that were completed #2 |
AVG |
double |
Yes |
All |
SUM(V$FILESTAT.PHYWRTS) |
Reads/sec (READ_RATE) |
Number of read operations per second #2 |
AVG |
double |
No |
All |
SUM(V$FILESTAT.PHYRDS) / seconds in interval |
Record Time (RECORD_TIME) |
Collection termination time for the performance data stored in the record#1 |
COPY |
time_t |
No |
All |
Agent Collector |
Record Type (INPUT_RECORD_TYPE) |
Record name (always PIDB)#1 |
COPY |
string(4) |
No |
All |
Agent Collector |
Redo Files (REDO_FILES) |
Number of REDO log files #2 |
AVG |
ulong |
No |
All |
COUNT(V$LOGFILE) |
Rollback Segments (ROLLBACK_SEGMENTS) |
Number of rollback segments #2 |
AVG |
ulong |
No |
All |
COUNT(V$ROLLNAME) |
Rollback Segments Hit % (ROLLBACK_SEGMENTS_HIT_PERCENTAGE) |
Rate at which the rollback segment header was obtained without waiting #2 |
AVG |
double |
No |
All |
((SUM(V$ROLLSTAT.GETS) - SUM(V$ROLLSTAT.WAITS)) / SUM(V$ROLLSTAT.GETS)) * 100 |
Rollback Segments Trans (ROLLBACK_SEGMENTS_TRANS) |
Number of currently active transactions #2 |
AVG |
long |
No |
All |
SUM(V$ROLLSTAT.XACTS) |
Segments (SEGMENTS) |
Correct values cannot be collected in this field. Number of segments. #2 |
AVG |
ulong |
No |
All |
|
Sort Segments (SORT_SEGMENTS) |
Correct values cannot be collected in this field. Number of sort segments. #2 |
AVG |
ulong |
No |
All |
COUNT(V$SORT_SEGMENT) |
Sorting Users (SORTING_USERS) |
Number of active users for the current sort segment #2 |
AVG |
long |
No |
All |
SUM(V$SORT_SEGMENT.CURRENT_USERS) |
Start Time (START_TIME) |
Collection start time for the performance data stored in the record#1 |
COPY |
time_t |
No |
All |
Agent Collector |
Tablespaces (TABLESPACES) |
Number of tablespaces #2 |
AVG |
double |
No |
All |
COUNT(DBA_TABLESPACES) |
Used Change (USED_CHANGE) |
Change to the used space in bytes#2 |
AVG |
double |
No |
All |
|
Used Mbytes (USED_BYTES) |
Size of used area in megabytes. If the monitoring target is locally managed temporary tablespaces, performance data are not collected. #2 |
AVG |
double |
No |
All |
|
Write % (WRITE_PERCENTAGE) |
Percentage ratio of write operations #2 |
AVG |
double |
No |
All |
(SUM(V$FILESTAT.PHYWRTS) / (SUM(V$FILESTAT.PHYRDS) + SUM(V$FILESTAT.PHYWRTS))) * 100 |
Writes/sec (WRITES_RATE) |
Number of write operations per second#2 |
AVG |
double |
No |
All |
SUM(V$FILESTAT.PHYWRTS) / seconds in interval |