Hello
I'm investigating performance on my Oracle database server and I suspect SGA and I/O on the server is an issue
it seems that the sql executions do not create any performance issue
below you can see some of the major sections in the AWR, seeem that SGA is Undersized and PGA is oversized.
Which parameters I have to investigate, and how can I fix them?
Thanks in advance!
I'm investigating performance on my Oracle database server and I suspect SGA and I/O on the server is an issue
it seems that the sql executions do not create any performance issue
below you can see some of the major sections in the AWR, seeem that SGA is Undersized and PGA is oversized.
Which parameters I have to investigate, and how can I fix them?
Thanks in advance!
HTML Code:
Host Name Platform CPUs Cores Sockets Memory(GB)
---------------- -------------------------------- ---- ----- ------- ----------
ORCL15 Microsoft Windows x86 64-bit 32 16 2 47.97
Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Avg
wait % DB
Event Waits Time(s) (ms) time Wait Class
------------------------------ ------------ ----------- ------ ------ ----------
DB CPU 10,281 38.9
log file sync 690,584 5,808 8 22.0 Commit
db file sequential read 657,551 4,249 6 16.1 User I/O
Disk file operations I/O 33,427 795 24 3.0 User I/O
db file scattered read 25,531 448 18 1.7 User I/O
Statistic Value End Value
------------------------- ---------------------- ----------------
AVG_BUSY_TIME 649,417
AVG_IDLE_TIME 65,535,931
AVG_SYS_TIME 121,154
AVG_USER_TIME 500,734
BUSY_TIME 21,780,334
IDLE_TIME 2,098,176,991
SYS_TIME 4,854,204
USER_TIME 16,944,590
RSRC_MGR_CPU_WAIT_TIME 21
PHYSICAL_MEMORY_BYTES 51,503,353,856
NUM_CPU_CORES 16
NUM_CPUS 32
NUM_CPU_SOCKETS 2
SGA Target Advisory
SGA Target SGA Size Est DB Est Physical
Size (M) Factor Time (s) Reads
---------- ---------- ------------ ----------------
2,048 0.5 1,480,938 43,022,199
2,560 0.6 324,314 43,022,199
3,072 0.8 253,682 23,928,169
3,584 0.9 232,868 18,009,216
4,096 1.0 226,239 16,386,912
4,608 1.1 222,959 15,562,650
5,120 1.3 220,741 14,821,962
5,632 1.4 218,253 14,392,625
6,144 1.5 218,094 14,392,625
6,656 1.6 218,004 14,392,625
7,168 1.8 217,913 14,392,625
7,680 1.9 217,846 14,392,625
8,192 2.0 217,800 14,392,625
-------------------------------------------------------------
PGA Memory Advisory
Estd Extra Estd P Estd PGA
PGA Target Size W/A MB W/A MB Read/ Cache Overallo Estd
Est (MB) Factr Processed Written to Disk Hit % Count Time
---------- ------- ---------------- ---------------- ------ -------- -------
614 0.1 652,658.5 138.6 100.0 5 4.6E+08
1,228 0.3 652,658.5 6.7 100.0 0 4.6E+08
2,456 0.5 652,658.5 6.7 100.0 0 4.6E+08
3,683 0.8 652,658.5 6.7 100.0 0 4.6E+08
4,911 1.0 652,658.5 6.7 100.0 0 4.6E+08
5,893 1.2 652,658.5 0.0 100.0 0 4.6E+08
6,875 1.4 652,658.5 0.0 100.0 0 4.6E+08
7,858 1.6 652,658.5 0.0 100.0 0 4.6E+08
8,840 1.8 652,658.5 0.0 100.0 0 4.6E+08
9,822 2.0 652,658.5 0.0 100.0 0 4.6E+08
14,733 3.0 652,658.5 0.0 100.0 0 4.6E+08
19,644 4.0 652,658.5 0.0 100.0 0 4.6E+08
29,466 6.0 652,658.5 0.0 100.0 0 4.6E+08
39,288 8.0 652,658.5 0.0 100.0 0 4.6E+08
-------------------------------------------------------------