一条SQL占用CPU 100%
一个查询语句执行时占用单核CPU资源100%,请帮忙分析原因。
SQL及执行计划如下:
*** 2012-08-29 11:46:25.764
WAIT #9: nam='SQL*Net message from client' ela= 16994971 driver id=1413697536 #bytes=1 p3=0 obj#=16923 tim=1314660142349078
STAT #7 id=1 cnt=3 pid=0 pos=1 obj=0 op='HASH GROUP BY (cr=8283188 pr=0 pw=0 time=75576024 us)'
STAT #7 id=2 cnt=3 pid=1 pos=1 obj=0 op='NESTED LOOPS (cr=8283188 pr=0 pw=0 time=22207347 us)'
STAT #7 id=3 cnt=20138 pid=2 pos=1 obj=0 op='NESTED LOOPS (cr=58213 pr=0 pw=0 time=503569 us)'
STAT #7 id=4 cnt=20138 pid=3 pos=1 obj=16923 op='TABLE ACCESS BY INDEX ROWID REAL_XS_BMSDHZ (cr=17935 pr=0 pw=0 time=161196 us)'
STAT #7 id=5 cnt=20138 pid=4 pos=1 obj=16925 op='INDEX RANGE SCAN IDX_REAL_XS_BMSDHZ_SP (cr=205 pr=0 pw=0 time=20201 us)'
STAT #7 id=6 cnt=20138 pid=3 pos=2 obj=16307 op='TABLE ACCESS BY INDEX ROWID BM (cr=40278 pr=0 pw=0 time=263247 us)'
STAT #7 id=7 cnt=20138 pid=6 pos=1 obj=16308 op='INDEX UNIQUE SCAN PK_BM (cr=20140 pr=0 pw=0 time=130059 us)'
STAT #7 id=8 cnt=3 pid=2 pos=2 obj=16307 op='TABLE ACCESS BY INDEX ROWID BM (cr=8224975 pr=0 pw=0 time=75131469 us)'
STAT #7 id=9 cnt=3 pid=8 pos=1 obj=16309 op='INDEX UNIQUE SCAN BM_BMDM (cr=8224972 pr=0 pw=0 time=75063047 us)'
STAT #7 id=10 cnt=12084 pid=9 pos=1 obj=0 op='NESTED LOOPS (cr=8204832 pr=0 pw=0 time=74863852 us)'
STAT #7 id=11 cnt=3452523 pid=10 pos=1 obj=16924 op='INDEX RANGE SCAN PK_REAL_XS_BMSDHZ (cr=1287698 pr=0 pw=0 time=34756285 us)'
STAT #7 id=12 cnt=12084 pid=10 pos=2 obj=16307 op='TABLE ACCESS BY INDEX ROWID BM (cr=6917134 pr=0 pw=0 time=36180549 us)'
STAT #7 id=13 cnt=3452523 pid=12 pos=1 obj=16308 op='INDEX UNIQUE SCAN PK_BM (cr=3464611 pr=0 pw=0 time=17895710 us)'
=====================
PARSING IN CURSOR #5 len=985 dep=0 uid=36 oct=3 lid=36 tim=1314660142349798 hv=3549420567 ad='fb568520'
SELECT C.BMDM,
C.DEPT_NAME,
A.XSSD1,
A.XSSD2,
0 XSJE,
0 XSBS,
0 YHJE,
0 XSJE_BHQ,
SUM (A.XSJE) OLD_XSJE,
SUM (A.YHJE) OLD_YHJE,
SUM (A.XSJE - A.YHJE) OLD_XSJE_BHQ,
SUM (A.XSBS) OLD_XSBS,
0 COMPARE,
0 KDJ,
0 OLD_KDJ,
0 KDJ_BHQ,
0 OLD_KDJ_BHQ
FROM REAL_XS_BMSDHZ A, BM B, BM C
WHERE A.DEPTID = B.DEPTID
AND SUBSTR (B.BMDM, 1, 4) = C.BMDM
AND A.JZRQ = '2012-8-22'
AND NOT EXISTS
(SELECT 1
FROM REAL_XS_BMSDHZ Z1, BM B1
WHERE Z1.XSSD1 = A.XSSD1
AND Z1.DEPTID = B1.DEPTID
AND SUBSTR (B1.BMDM, 1, 4) = C.BMDM
AND Z1.JZRQ = '2012-8-23')
GROUP BY C.BMDM,
C.DEPT_NAME,
A.XSSD1,
A.XSSD2
END OF STMT
PARSE #5:c=0,e=186,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=1314660142349795
EXEC #5:c=0,e=128,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=1314660142350084
WAIT #5: nam='SQL*Net message to client' ela= 1 driver id=1413697536 #bytes=1 p3=0 obj#=16923 tim=1314660142350130
WAIT #5: nam='gc cr block 2-way' ela= 394 p1=129 p2=25709 p3=1 obj#=16923 tim=1314660144811060
*** 2012-08-29 11:47:46.104
FETCH #5:c=80317790,e=78455566,p=0,cr=8283188,cu=0,mis=0,r=1,dep=0,og=1,tim=1314660220805742
WAIT #5: nam='SQL*Net message from client' ela= 3424 driver id=1413697536 #bytes=1 p3=0 obj#=16923 tim=1314660220809320
WAIT #5: nam='SQL*Net message to client' ela= 1 driver id=1413697536 #bytes=1 p3=0 obj#=16923 tim=1314660220809468
FETCH #5:c=0,e=78,p=0,cr=0,cu=0,mis=0,r=2,dep=0,og=1,tim=1314660220809529
WAIT #5: nam='SQL*Net message from client' ela= 12233 driver id=1413697536 #bytes=1 p3=0 obj#=16923 tim=1314660220821911
=====================
在fetch阶段出现耗费大量CPU等待时间，这是为何？
环境：
OS：
lsb_release -d
Description: Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
数据库版本：
SQL> select * From v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
bf01</oracle/admin/bfdb/udump>$cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 3
siblings : 4
core id : 12
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4270.34
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 8
siblings : 4
core id : 32
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.12
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 4
siblings : 4
core id : 16
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.11
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 15
siblings : 4
core id : 60
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.08
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 3
siblings : 4
core id : 13
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 8
siblings : 4
core id : 33
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.22
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 4
siblings : 4
core id : 17
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.06
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 15
siblings : 4
core id : 61
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.10
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 8
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 3
siblings : 4
core id : 14
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.12
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 9
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 8
siblings : 4
core id : 34
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.21
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 10
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 4
siblings : 4
core id : 18
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.08
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 11
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 15
siblings : 4
core id : 62
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.09
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 12
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 3
siblings : 4
core id : 15
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.01
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 13
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 8
siblings : 4
core id : 35
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.07
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 14
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 4
siblings : 4
core id : 19
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.13
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 15
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU E7320 @ 2.13GHz
stepping : 11
cpu MHz : 2132.385
cache size : 2048 KB
physical id : 15
siblings : 4
core id : 63
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl est tm2 cx16 xtpr lahf_lm
bogomips : 4264.11
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
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All options in Code insight disabled.
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The next time I open it, all's fine. It sits there, again with nothing open (connections/files etc), at 118MB usage steady with 0% util. Seems like the first time I run the app after a reboot, it goes haywire on resources. Wish I could attach a screen print image.I have the same issue, same sporadic behavior.
SQL Dev ver 1.5.1 54 40
Win XP sp 3 , Gateway dual core laptop, 4G ram
All options in Code Insight disabled.
When it kicks off, it goes to mem usage 634M or so,
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SELECT M.FID, M.ANCHORPOSITION, M.HEIGHT, M.ORIENTATION, M.TEXTSTRING, M.GEOM.SDO_POINT.X X, M.GEOM.SDO_POINT.Y Y
FROM CARTOGRAPHICTEXT M
WHERE M.FID IN (SELECT FID FROM CTDESCRIPTIVEGROUP WHERE DESCRIPTIVEGROUPID = 40)
AND M.PROCESSED = 'F'
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Total Per Execution Per Row
Executions 1 1 0.00
CPU Time (sec) 450745.25 450745.25 6.70
Buffer Gets 1895169951 1895169951.00 28180.97
Disk Reads 36611613 36611613.00 544.41
Direct Writes 0 0.00 0.00
Rows 67250 67250.00 1
Fetches 2690 2690.00 0.04
the table cartographictext has circa 1million rows and the select statement selecting from ctdescripitvegroup will return 12million rows.
when viewing the top events in linux, oracle pid calling this sql is showing %cpu at 100. similarly when viewing the diagnostics in em console, the cpu is at 100%.
the application runs a number of sql statements onthe table with varying where clauses. on similar sql events on another table prior to this, the first sql call to the table took 11 hours to complete, but the subsequent sql were completed in less then 2 minutes per call.
the above statement has been running for 4 days now and only returned 67000 rows.
having checked the other stats, i wasn't able to determine where the problem lies.
some other stats gathered for the sql running were (name, value, per second, per transaction)
session logical reads 15656741223.00 33714.06 196601.34
db block changes 112877872.00 243.06 1417.40
physical reads 43149624.00 92.92 541.83
redo size (KB) 13437993.80 28.94 168.74
execute count 2748199.00 5.92 34.51
physical writes 2456826.00 5.29 30.85
DB time (seconds) 1899189.45 4.09 23.85
user calls 1085873.00 2.34 13.64
opened cursors cumulative 1047893.00 2.26 13.16
parse count (total) 1002199.00 2.16 12.58
session cursor cache hits 696558.00 1.50 8.75
workarea executions - optimal 504960.00 1.09 6.34
user commits 75505.00 0.16 0.95
user rollbacks 4132.00 0.01 0.05
parse time elapsed (seconds) 50.86 0.00 0.00
parse time cpu (seconds) 26.27 0.00 0.00
workarea executions - onepass 16.00 0.00 0.00
sql tuning advisor does flag it as not very well tuned, but then doesn't offer any recommendations. stats have been gathered on the tables. have tried some hints, but not to much success, explain plan said it was using a hash join right semi.
any help would be appreiciated.execution plan for original sql
12260902 rows selected.
Elapsed: 00:03:15.46
Execution Plan
Plan hash value: 662574731
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost
(%CPU)| Time |
| 0 | SELECT STATEMENT | | 1476K| 108M| | 198K (3)| 00:39:39 |
|* 1 | HASH JOIN RIGHT SEMI| | 1476K| 108M| 50M| 198K (3)| 00:39:39 |
|* 2 | TABLE ACCESS FULL | CTDESCRIPTIVEGROUP | 1476K| 33M| | 20567 (4)| 00:04:07 |
|* 3 | TABLE ACCESS FULL | CARTOGRAPHICTEXT | 22M| 1118M| | 106K (4)| 00:21:18 |
Predicate Information (identified by operation id):
1 - access("M"."FID"="FID")
2 - filter("DESCRIPTIVEGROUPID"=40)
3 - filter("M"."PROCESSED"='F')
Statistics
1905 recursive calls
0 db block gets
561135 consistent gets
797262 physical reads
0 redo size
710207339 bytes sent via SQL*Net to client
8991723 bytes received via SQL*Net from client
817395 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
12260902 rows processed -
Oracle.exe and java.exe are running my CPU 100% under XP Prof SP3
11gR1
oracle.exe and java.exe are running 100% CPU
I have increased virtual memory to 4 gig
I have defragmented the drive.
I checked the drive for errors.
I am searching the whole drive for viruses
I do not have the problem with Redhat Fedora 12 running 11gR1
I have 1 gig of RAM but cannot install release 2 because the installer expects
1 gig + 1ooops!!! left that off...sorry
XP Prof SP3 32 bit..*.no problem with Redhat Fedora 12 running MySQL and 11gR1*
1 gig RAM Dell precision W/S 1.5 Gig rate 74 GiG SCSI HD 15000 RPM
Don't pass out but I am also running MySQL server 5.1.41 and MS SQL Server Express 2008.
Lucky it didn't catch fire
I installed XP prof months ago but this CPU domination occurred only starting last night!
However slow everything works in 11gR1
sqlplus myname/password and then select rows from table
sqldeveloper
PHP web sites
I've had plenty of trouble with Java running slow and hogging memory!
Edited by: landonmkelsey on May 2, 2010 12:21 PM
Edited by: landonmkelsey on May 2, 2010 12:24 PM
Let me guess...stop services for MySQL and MS SQL Server and see what happens!
Edited by: landonmkelsey on May 2, 2010 12:26 PM -
Just for clarification, you are talking about the alerts caused by VeeamOne, not Veeam Backup & Replication, correct?
So I started getting warnings from Veeam about our SQL server's CPU usage. It got up to 100% at one point in the day and stayed there for 30 minutes or so.Our SQL Server specs are:4 CPU's @ 2.GHZ each I think.... 4 CPU's nonetheless.16 GB ramvirtualized on vsphere 5.1So I logged into the SQL server to see what was up (note that this has been happening for the past month or so, just hadn't had time to actually sit down and work on it, plus it didn't seem to effect the performance of our patient software too much which runs on SQL. Until this morning and it was very sluggish.)I noticed that the SQL server processes were running at 50% or more sometimes. I caught a screen shot of it when it was on it's way down. How can I trouble shoot something like this and figure out what in the hell is causing it to spike? I am not a master at SQL so...
This topic first appeared in the Spiceworks Community -
Hi everyone,
got a strange occurrence that takes place often and I wondered if anyone had come across this type of behavior before.
I have a test server that is running SQL 2005 sp4 (don't believe the version is the cause), it's running on a esxi VM which I don't actually have control over.
every couple days, the customer will report that the system is running slow. I check the server, and find that SQL is running at 90%+ of the CPU...constantly.
checking activity monitor, I see that the queries are the same select queries that the site would run every day for testing. Except, that now, it's taking a minute plus to execute.
I have to then run a reindex (with online= ON, for them to continue using the DB), and that takes about 2 minutes, and then the CPU is back to normal and the same select queries take less than a second to complete.
This is a very small DB (maybe about 3 gigs), and the fragmentation of the indexes are hardly anything to note.
My initial thought was that maybe the site is using Vmotion or some ESXi feature that's somehow causing the DB to get into this state. But, it's only a theory at this point.
wondering if anyone has come across this type of behavior before and can shed some light or tips for me to track the issue down.
thanks!In addition
---This first thing to check if CPU is at 100% is to look for parallel queries:
-- Tasks running in parallel (filtering out MARS requests below):
select * from sys.dm_os_tasks as t
where t.session_id in (
select t1.session_id
from sys.dm_os_tasks as t1
group by t1.session_id
having count(*) > 1
and min(t1.request_id) = max(t1.request_id));
-- Requests running in parallel:
select *
from sys.dm_exec_requests as r
join (
select t1.session_id, min(t1.request_id)
from sys.dm_os_tasks as t1
group by t1.session_id
having count(*) > 1
and min(t1.request_id) = max(t1.request_id)
) as t(session_id, request_id)
on r.session_id = t.session_id
and r.request_id = t.request_id;
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
Improves MS SQL Database Performance
SQL Server Integration Services:
Business Intelligence -
[GNOME 3.4] gnome-shell overview search + gnome-documents - CPU 100%
Hello
When I type something in the gnome shell overview my CPU goes to 100% for a few seconds even after I left the overview.
The process which is taking my CPU is : gjs-console
With gnome 3.4 you can search for documents via the gnome shell overview, this search is based on gnome-documents. So I tried dis-installing gnome-documents and the problem was solved.
I don't know if it's a bug... but if the gjs-console really is the documents overview search process, it's strange that it doesn't stop when I leave this overview.
What do you think ? Should I report it as a bug ? Arch bug / upstream bug ?
PS : By the way, the gnome-shell extension "tracker-search" is faster and, I think, better for finding documents via the overview.This behaviour is the same in my box but I don't think it's an arch bug but an upstream issue (its not a bug formally speaking)... maybe it should be reported to the gnome-documents team in order they do more polish to it.
Best, -
Slow throughput Ironport S370 Proxy CPU 100%
We have a cluster of 3 x Ironport S370's all running 7.7.0-753
The throughput is really poor we have a 500Mbps Internet connection which at it's peak is only getting to 120Mbps as the Ironports don't seem to be able to handle the traffic.
The Proxy CPU% is always close to 100% but the overall CPU is usually at no more than 30% at times it can take up to 60 seconds to load the initial page particularly if the site is an HTTPS site.
We have
22 Identities
62 Access policies
6 decryption Policies
Our maintainer says that having this number of Identities / policies should not be an issue but I have my doubts.
Can anyone advise as it's really become a major issue, Output from the rate and status commands are below.
%proxy reqs client server %bw disk disk
CPU /sec hits blocks misses kb/sec kb/sec saved wrs rds
99.00 285 373 1293 1193 26484 21838 17.5 550 100
99.00 286 209 1313 1335 28682 24532 14.5 635 80
99.00 285 182 1323 1359 37083 33529 9.6 1351 0
100.00 231 132 1051 1113 34816 34151 1.9 355 0
98.00 253 161 1171 1195 39668 37236 6.1 1363 0
99.00 294 256 1225 1469 51371 43304 15.7 1117 40
96.00 346 525 1166 1763 31882 23300 26.9 1328 0
98.00 302 228 1258 1534 30385 25565 15.9 1302 0
99.00 295 149 1200 1597 26253 22888 12.8 816 0
98.00 275 199 1020 1536 35237 31443 10.8 838 0
99.00 288 184 1131 1574 35019 26688 23.8 1433 0
99.00 262 116 1073 1437 24744 23228 6.1 1306 0
105.00 307 292 1165 1610 24249 20236 16.6 1061 0
Status as of: Thu Oct 16 08:28:10 2014 GMT
Up since: Wed Oct 15 15:21:19 2014 GMT (17h 6m 51s)
System Resource Utilization:
CPU 28.2%
RAM 82.6%
Reporting/Logging Disk 16.0%
Transactions per Second:
Average in last minute 266
Maximum in last hour 296
Average in last hour 118
Maximum since proxy restart 296
Average since proxy restart 9
Bandwidth (Mbps):
Average in last minute 25.461
Maximum in last hour 49.605
Average in last hour 16.400
Maximum since proxy restart 49.605
Average since proxy restart 1.365
Response Time (ms):
Average in last minute 179
Maximum in last hour 526
Average in last hour 192
Maximum since proxy restart 17710
Average since proxy restart 3165
Cache Hit Rate:
Average in last minute 16
Maximum in last hour 25
Average in last hour 7
Maximum since proxy restart 25
Average since proxy restart 0
Connections:
Idle client connections 1276
Idle server connections 1170
Total client connections 1638
Total server connections 1890In the release notes it states...
IMPORTANT: During testing of AsyncOS 7.7.0, Cisco observed performance changes ranging from +
33% to - 16%, depending on the model and configuration. Performance degradation risk is limited to
S160 & S360 models and models S370 and S660 that are running the web proxy without security
services. If you experience performance degradation with AsyncOS 7.7.0, Cisco recommends that you
revert to AsyncOS 7.5.x.
http://www.cisco.com/c/dam/en/us/td/docs/security/wsa/wsa7-7/Release_Notes/WSA_7-7-0_Builds_after_725_Release_Notes.pdf -
[linux] 9.0.115.0 causes CPU 100% with firefox
The 9.0.115.0 version of FlashPlayer causes 80-100% CPU
consumption with latest Firefox on linux.
The only solution I found, I get back to the 48... Can you
fix it? Can you help me?I have the same problem with 9.0.115.0 in Linux.
I have posted a bug-report to Adobe support last week - no
reaction yet.
Good site for testing is:
http://www.lanik.us/misc/ff-flash-test.html -
Pages 5.1 Fluctuates between 0.6% CPU & 100% CPU
I have only used Pages a few times. I recently got iWork when I upgraded to Mavericks. I designed a template that looks exactly like a college ruled notebook so I can visualize ruled pages.
There are about 36 objects, which are a set of GROUPED & LOCKED horizontal blue lines and one vertical red line and are not obstructed or moved by text.
Now when I begin to write or type on the page after I've saved as template, I can usually get about 5 words or so in before I get that spinning pinwheel / beach ball. The spinning lasts about 2 minutes.
At this time, I open the Activity Monitor and watch what occurs. The % CPU goes from 0.6 - 100% when this occurs. It also says in the Process name that the application is (Not Responding) while it spins.
I am not sure if this is an autosave thing that is occurring or not. I have saved a file directly on the Desktop as well as iCloud, and it seems that this occurs in both forms of working on Pages.
I have done simple procedures like quit app, restart / shutdown computer, etc to no avail. I would like to continue to use Pages, but this is completely not acceptable.
Any suggestions?
Cheers,
jeffThanks, mate, thought that might be an issue, but didn't want to believe that was the case.
How does one spend any time at all working in Pages if they truly used what it is designed for - adding objects / images, etc. - without feeling like they've timewarped back to 133mHz computers?
It is bizarre, because I set the object as static objects and not to be manipulated by the text. Is it still doing a calculation even though they are fixed vector lines? I would think that the LOCKED option eliminates that factor and sees it sort of as a flattened object in the background, no?
It's truly painful. I can type on my iPhone with much less issues.
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