CURRENT_OPEN_WINDOW

hi,
i am getting the following my alert log file and after the time i am getting this
there is drastic performance issue in my db.
Please suggest what should i do ?
Thanks in advance.
Deep
KGL object name :SYS.CURRENT_OPEN_WINDOW
Sat Feb 17 19:23:43 2007
Memory Notification: Library Cache Object loaded into SGA
Heap size 4812K exceeds notification threshold (2048K)
Details in trace file /u01/app/oracle/product/10.2.0/db_1/admin/kumaondb/bdump/kumaondb2_cjq0_4353.trc
KGL object name :SYS.WEEKNIGHT_WINDOW
Sat Feb 17 19:23:45 2007
Memory Notification: Library Cache Object loaded into SGA
Heap size 3964K exceeds notification threshold (2048K)
Details in trace file /u01/app/oracle/product/10.2.0/db_1/admin/kumaondb/bdump/kumaondb2_cjq0_4353.trc
KGL object name :SYS.CURRENT_OPEN_WINDOW
Sat Feb 17 19:23:45 2007
Memory Notification: Library Cache Object loaded into SGA
Heap size 4812K exceeds notification threshold (2048K)
Details in trace file /u01/app/oracle/product/10.2.0/db_1/admin/kumaondb/bdump/kumaondb2_cjq0_4353.trc
KGL object name :SYS.WEEKNIGHT_WINDOW

this ia also some content of my trace file.
Memory Notification: Library Cache Object loaded into SGA
Heap size 4860K exceeds notification threshold (2048K)
LIBRARY OBJECT HANDLE: handle=c00000002276dab8 mutex=c00000002276dbe8(0)
name=SYS.WEEKNIGHT_WINDOW
hash=a4a232de05b1efb6df973bde1223dbbb timestamp=02-17-2007 01:11:05
namespace=TABL flags=KGHP/TIM/XLR/[00000020]
kkkk-dddd-llll=0000-0000-0000 lock=X pin=X latch#=1 hpc=0012 hlc=0012
lwt=c00000002276db60[c00000002276db60,c00000002276db60] ltm=c00000002276db70[c00000002276db70,c00000002276db70]
pwt=c00000002276db28[c00000002276db28,c00000002276db28] ptm=c00000002276db38[c00000002276db38,c00000002276db38]
ref=c00000002276db90[c00000002276db90,c00000002276db90] lnd=c00000002276dba8[c00000002276dba8,c00000002276dba8]
LOCK INSTANCE LOCK: id=LBa4a232de05b1efb6
PIN INSTANCE LOCK: id=NBa4a232de05b1efb6 mode=X release=F flags=[00]
INVALIDATION INSTANCE LOCK: id=IV000022af11020c06 mode=S
LIBRARY OBJECT: object=c00000002e0fbe98
type=JSWN flags=EXS/LOC[0005] pflags=[0000] status=VALD load=0
DATA BLOCKS:
data# heap pointer status pins change whr alloc(K) size(K)
0 c00000002276d9f8 c00000002e0fbfb0 I/P/A/-/- 0 NONE 00 4860.59 0.00
Memory Notification: Library Cache Object loaded into SGA
Heap size 4004K exceeds notification threshold (2048K)
LIBRARY OBJECT HANDLE: handle=c00000002276e0c0 mutex=c00000002276e1f0(0)
name=SYS.CURRENT_OPEN_WINDOW
hash=1564f560451520dfa6e261d813d3eb93 timestamp=07-21-2005 19:16:32
namespace=JSGA flags=KGHP/TIM/XLR/[00000020]
kkkk-dddd-llll=0000-0000-0000 lock=S pin=S latch#=1 hpc=0100 hlc=0100
lwt=c00000002276e168[c00000002276e168,c00000002276e168] ltm=c00000002276e178[c00000002276e178,c00000002276e178]
pwt=c00000002276e130[c00000002276e130,c00000002276e130] ptm=c00000002276e140[c00000002276e140,c00000002276e140]
ref=c00000002276e198[c00000002276e198,c00000002276e198] lnd=c00000002276e1b0[c00000002276e1b0,c00000002276e1b0]
LOCK INSTANCE LOCK: id=EZ1564f560451520df
PIN INSTANCE LOCK: id=GZ1564f560451520df mode=S release=F flags=[00]
INVALIDATION INSTANCE LOCK: id=IV000014d415141121 mode=S
LIBRARY OBJECT: object=c00000002e0fc2f0
type=JSGA flags=EXS/LOC[0005] pflags=[0000] status=VALD load=X
DATA BLOCKS:
data# heap pointer status pins change whr alloc(K) size(K)
0 c00000002276e000 c00000002e0fc408 I/P/A/-/- 0 NONE 00 4004.25 0.00
Memory Notification: Library Cache Object loaded into SGA
Heap size 4861K exceeds notification threshold (2048K)
LIBRARY OBJECT HANDLE: handle=c00000002276dab8 mutex=c00000002276dbe8(0)
name=SYS.WEEKNIGHT_WINDOW
hash=a4a232de05b1efb6df973bde1223dbbb timestamp=02-17-2007 01:11:05
namespace=TABL flags=KGHP/TIM/XLR/[00000020]
kkkk-dddd-llll=0000-0000-0000 lock=X pin=X latch#=1 hpc=0012 hlc=0012
lwt=c00000002276db60[c00000002276db60,c00000002276db60] ltm=c00000002276db70[c00000002276db70,c00000002276db70]
pwt=c00000002276db28[c00000002276db28,c00000002276db28] ptm=c00000002276db38[c00000002276db38,c00000002276db38]
ref=c00000002276db90[c00000002276db90,c00000002276db90] lnd=c00000002276dba8[c00000002276dba8,c00000002276dba8]
LOCK INSTANCE LOCK: id=LBa4a232de05b1efb6
PIN INSTANCE LOCK: id=NBa4a232de05b1efb6 mode=X release=F flags=[00]
INVALIDATION INSTANCE LOCK: id=IV000022af11020c06 mode=S
LIBRARY OBJECT: object=c00000002e0fbe98
type=JSWN flags=EXS/LOC[0005] pflags=[0000] status=VALD load=0
DATA BLOCKS:
data# heap pointer status pins change whr alloc(K) size(K)
0 c00000002276d9f8 c00000002e0fbfb0 I/P/A/-/- 0 NONE 00 4861.05 0.00

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