Cleaning the Dust! Performance Issues

Lately my eMachine T3265 desktop PC has started running really slowly. It's about four years old. I've been told it could be a number of things: RAM, processor or simply that there are too many dust bunnies living inside and it needs to be cleaned. Because the dust bunnies are something I can probably handle on my own, I'm wondering what's the best way to clean the machine..... Once I've disconnected everything and have taken it outside, should I take the cover off and spray the entire INSIDE with air OR do I just simply spray the vents, fans, connections from the outside.
I might not want to tackle this on my own. So if I do decide to take this to the Geek Squad to handle, what additional things can they do as far as cleaning that I can't do on my own AND how much is that service? What are the pros of letting them do it? Also, do I need to bring it into a store or is this a service that is also provided in-home?
Thank you!

wow u really like doing colors.
cleaning out dust is pretty easy. there's no "official way" to do it.
1) if it's REALLY dusting, this is what i usually do. get a vaccuum cleaner. get the thinest hose u have with the vaccuum. suck up all the dust first.
2) get those air can thing. they are high pressure but don't worry, your computer component is solder on the board so nothing will come lose
3) while u're blowing the dust off inside the computer, use the same vaccuum cleaner to suck up all the dust that's flying off, because once u blow it off from one location, it'll just land on another location. so use the vaccuum to suck up the air borne dust.
and viola u're done!
or go buy a leaf blower. one blow, every dust will come off :-D (<---- do not attempt, cuz u'll probably rip everythign else apart too)
u said it was emachine right? im guessing low memory. u can try updating the memory. u'll be surprise adding another gig of memory can boost system performance. you got the emachine so i guess when you got the computer it was built barely enough to run the operating system.
if your not comfortable, u can bring ur computer in for 1) hardware diagnostic 2) optimization. sometimes hardware deteoriation cause computer to slow down too. heat can cause the parts to go bad. so the hardware diagnostic can actually detect if something is wrong.
optimization allows geeksquad to completely clean out your computer. software-wise. clean up the junk, tweak your registry, shut down unnecessary program that are running in the background. that will free up some memory for you to do other stuff.

Similar Messages

How to clean the dust at charging case

Hi all,
how to clean the dust at charging case rubber....
Cause i have no idea to clean it...
>.<

you can clean it do you have some stickers then remove it and apply to that dust area next again remove it u can clean it like that or use screen cleaning cloths
Do not forget to give kudosand to select the correct answer

How to clean the dust inside the screen of the iPod Touch?

Hi everybody,
lately some dust entered inside the screen of my iPod Touch.
At first it looked like one or two pixels were gone bad, but it is just some annoying dust.
The problem is that I cannot figure out any way to remove it.
I tried a gentle blow from the connector hole but the result was worse.
Any idea on how to clean the screen inside?
I hope it is not necessary to go to an Apple Center and pay for the "cleaning service".
Regards,
Andrea

It sounds safe to use
'Falcon's® "Professional" Dust-Off® "XL" compressed-gas is the perfect product for removing dust from your color transparencies before making scans or copy slides; it's also great for removing dust from cameras, lenses, computers and other electronic equipment. Each 12 oz. disposable can comes with its own trigger value and a 4.75" nozzle extension (a red tube) that allows you to place precise bursts of compressed air just where you want it.'
Check the directions on the back... also check the contents. Normally anything like that will inform you of contaminants harmful to delicate electrical devices.
If its just compressed air make sure you keep the can well back from the source.. and unplug the G5 (take it somewhere you don't mind dust.. there no point doing this in situe, just for it to suck it back in again!)
Also.. as mentioned.. keep the can upright (as the air is decompressed the can gets very cold)
Stu
Powermac G5 2.5 Mac OS X (10.4.2) 460gb HD 3gb RAM

Any way of cleaning the dust behind a matte screen?

I have a few specs of dust that have been bugging me!
This is a brand new laptop as well. What is the best way to get rid of the dust? And is there a way to protect the screen from getting more dust? THANKS!
Macbook Pro Mac OS X (10.4.8)

I would take it into your local Apple Store/authorised service centre to have them have a look at it. Dust or dead pixels you should have so many as to bother you.

Effective way to clean the dust out of your Macbook Pro?

Lately the fan on my Macbook Pro has been running a lot much more often & it has been making a lot more noise; mainly because it is clogged with a lot of dust.
Is there an effective way to cleaning it out? If so, how? Be detailed as possible.

I generally don't recommend those who haven't done it before to remove the bottom cover and administer self-repair.
Qtips and tiny paintbrushes is what we used at the laptop repair place to remove the caked on junk on the fan blades.
If a fan was removed by a authorized repairman to be cleaned, compressed air is used then Qtips with isoproply is used for a complete cleaning.
Its important to have your Apple store remove the caked on gunk on the blades causes stress to the fan hub and bearings which rapidly leads to the destruction of the fan, and if dead would cause your laptop to overheat. A leads to B leads to C.

Help to rewrite the query --performance issue

Hi ,
Please help to rewrite the query since it's performance is not good.Especially second inline query(CASE statements are therein select caluse ..)is taking more cost.
Database Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bi
SELECT *
FROM
(SELECT q.*,
    COUNT(*) OVER() AS record_count,
    ROWNUM          AS row_num
FROM
    (SELECT ExName.examiner_code,
      examiner_name,
      :v_year,
      :v_month,
      count_fb,
      NVL(count_entered_fb, 0) count_entered_fb,
      NVL(count_sent_fb, 0) count_sent_fb,
      NVL(count_edited_fb, 0) count_edited_fb,
      NVL(count_complete_fb, 0) count_complete_fb,
      NVL(count_withibcardiff_fb, 0) count_withibcardiff_fb
    FROM
      (SELECT examiner_code,
        COUNT(*) AS count_fb
      FROM
        (SELECT
                    examiner_code,
          paper_code,
          assessment_school
        FROM
          ( SELECT DISTINCT ce.examiner_code,
            ce.paper_code,
            ce.assessment_school
          FROM
            (SELECT
              DISTINCT assessment_school,
              paper_code,
              examiner_code
            FROM candidate_examiner_allocation cea
            WHERE cea.element = 'Moderation of IA'
            AND cea.year      = :v_year
            AND cea.month     = :v_month
            ) ce,
            subject_group sg,
            subject_component sc
          WHERE (:v_padded_examiner_code IS NULL
          OR ce.examiner_code            = :v_padded_examiner_code)
          AND (:v_subject_group          IS NULL
          OR sg.group_number             = :v_subject_group)
          AND sg.year                    = :v_year
          AND sg.month                   = :v_month
          AND sc.year                    = :v_year
          AND sc.month                   = :v_month
          AND sc.paper_code              = ce.paper_code
          AND sc.subject                 = sg.subject
          AND sc.lvl                     = sg.lvl
          AND (:v_subject                IS NULL
          OR sc.subject                  = :v_subject)
          AND (:v_lvl                    IS NULL
          OR sc.lvl                      = :v_lvl)
          ) ea
      GROUP BY examiner_code
      ) ExName,
      (SELECT examiner_code,
        COUNT(
        CASE
          WHEN UPPER(wfi.status) = 'ENTERED'
          THEN 1
          ELSE NULL
        END) AS count_entered_fb,
        COUNT(
        CASE
          WHEN UPPER(wfi.status) = 'SENT'
          THEN 1
          ELSE NULL
        END) AS count_sent_fb,
        COUNT(
        CASE
          WHEN UPPER(wfi.status) = 'EDITED'
          THEN 1
          ELSE NULL
        END) AS count_edited_fb,
        COUNT(
        CASE
          WHEN UPPER(wfi.status) = 'COMPLETE'
          THEN 1
          ELSE NULL
        END) AS count_complete_fb,
        COUNT(
        CASE
          WHEN UPPER(wfi.status) = 'WITH IBCARDIFF'
          THEN 1
          ELSE NULL
        END) AS count_withibcardiff_fb
      FROM ia_instances ia1,
        workflow_instance wfi
      WHERE wfi.instance_id = ia1.workflow_instance_id
      AND ia1.year          = :v_year
      AND ia1.month         = :v_month
      GROUP BY ia1.year,
        ia1.month,
        examiner_code
      ) iaF,
      (SELECT person_code,
        title
        || ' '
        || firstname
        || ' '
        || lastname AS examiner_name
      FROM person
      WHERE :v_examiner_name IS NULL
      OR UPPER(title
        || ' '
        || firstname
        || ' '
        || lastname) LIKE :v_search_examiner_name
      ) P
    WHERE ExName.examiner_code = iaF.examiner_code (+)
    AND ExName.examiner_code   = p.person_code
    ORDER BY ExName.examiner_code
    ) q
) rc
WHERE row_num >= :v_start_row
AND row_num   <= (:v_start_row+(:v_max_row-1));explain plan
line 1: SQLPLUS Command Skipped: set linesize 130
line 2: SQLPLUS Command Skipped: set pagesize 0
PLAN_TABLE_OUTPUT
Plan hash value: 1581970599
| Id | Operation                                 | Name                           | Rows | Bytes |TempSpc| Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                          |                                |     1 |   276 |       | 2187   (6)| 00:00:34 |
|* 1 | FILTER                                   |                                |       |       |       |            |          |
|* 2 |   VIEW                                    |                                |     1 |   276 |       | 2187   (6)| 00:00:34 |
|   3 |    WINDOW BUFFER                          |                                |     1 |   250 |       | 2187   (6)| 00:00:34 |
|   4 |     COUNT                                 |                                |       |       |       |            |          |
|   5 |      VIEW                                 |                                |     1 |   250 |       | 2187   (6)| 00:00:34 |
|   6 |       SORT ORDER BY                       |                                |     1 |   119 |       | 2187   (6)| 00:00:34 |
|   7 |        NESTED LOOPS                       |                                |     1 |   119 |       | 2186   (6)| 00:00:34 |
|* 8 |         HASH JOIN OUTER                   |                                |     1 |    92 |       | 2185   (6)| 00:00:34 |
|   9 |          VIEW                             |                                |     1 |    20 |       |    51   (4)| 00:00:01 |
| 10 |           SORT GROUP BY                   |                                |     1 |     7 |       |    51   (4)| 00:00:01 |
| 11 |            VIEW                           |                                |     1 |     7 |       |    51   (4)| 00:00:01 |
| 12 |             SORT UNIQUE                   |                                |     1 |   127 |       |    51   (4)| 00:00:01 |
| 13 |              NESTED LOOPS                 |                                |     1 |   127 |       |    50   (2)| 00:00:01 |
|* 14 |               HASH JOIN                   |                                |     1 |    68 |       |    44   (3)| 00:00:01 |
|* 15 |                TABLE ACCESS BY INDEX ROWID| SUBJECT_COMPONENT              |    13 |   520 |       |    40   (0)| 00:00:01 |
|* 16 |                 INDEX RANGE SCAN          | SUBJECT_COMPONENT_ASSESS_TYPE | 1059 |       |       |     9   (0)| 00:00:01 |
|* 17 |                INDEX RANGE SCAN           | SUBJECT_GROUP_PK               |    41 | 1148 |       |     3   (0)| 00:00:01 |
|* 18 |               INDEX RANGE SCAN            | CEA_AUTOMATIC_ALLOCATION_STATS |     5 |   295 |       |     6   (0)| 00:00:01 |
| 19 |          VIEW                             |                                |   679 | 48888 |       | 2133   (6)| 00:00:33 |
| 20 |           SORT GROUP BY                   |                                |   679 | 25123 |       | 2133   (6)| 00:00:33 |
|* 21 |            HASH JOIN                      |                                | 52408 | 1893K| 1744K| 2126   (6)| 00:00:33 |
| 22 |             TABLE ACCESS BY INDEX ROWID   | IA_INSTANCES                   | 52408 | 1125K|       |   688   (1)| 00:00:11 |
|* 23 |              INDEX RANGE SCAN             | IND_IA_INSTANCES               | 49077 |       |       |   137   (2)| 00:00:03 |
| 24 |             TABLE ACCESS FULL             | WORKFLOW_INSTANCE              | 1075K|    15M|       |   960   (7)| 00:00:15 |
|* 25 |         TABLE ACCESS BY INDEX ROWID       | PERSON                         |     1 |    27 |       |     1   (0)| 00:00:01 |
|* 26 |          INDEX UNIQUE SCAN                | PERSON_PK                      |     1 |       |       |     0   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   1 - filter(TO_NUMBER(:V_START_ROW)<=TO_NUMBER(:V_START_ROW)+(TO_NUMBER(:V_MAX_ROW)-1))
   2 - filter("ROW_NUM">=TO_NUMBER(:V_START_ROW) AND "ROW_NUM"<=TO_NUMBER(:V_START_ROW)+(TO_NUMBER(:V_MAX_ROW)-1))
   8 - access("EXNAME"."EXAMINER_CODE"="IAF"."EXAMINER_CODE"(+))
14 - access("SC"."SUBJECT"="SG"."SUBJECT" AND "SC"."LVL"="SG"."LVL")
15 - filter((:V_SUBJECT IS NULL OR "SC"."SUBJECT"=:V_SUBJECT) AND ("SC"."LVL"=:V_LVL OR :V_LVL IS NULL))
16 - access("SC"."YEAR"=TO_NUMBER(:V_YEAR) AND "SC"."MONTH"=:V_MONTH)
17 - access("SG"."YEAR"=TO_NUMBER(:V_YEAR) AND "SG"."MONTH"=:V_MONTH)
       filter(:V_SUBJECT_GROUP IS NULL OR "SG"."GROUP_NUMBER"=TO_NUMBER(:V_SUBJECT_GROUP))
18 - access("CEA"."YEAR"=TO_NUMBER(:V_YEAR) AND "CEA"."MONTH"=:V_MONTH AND "SC"."PAPER_CODE"="PAPER_CODE" AND
              "CEA"."ELEMENT"='Moderation of IA')
       filter("CEA"."ELEMENT"='Moderation of IA' AND (:V_PADDED_EXAMINER_CODE IS NULL OR
              "EXAMINER_CODE"=:V_PADDED_EXAMINER_CODE))
21 - access("WFI"."INSTANCE_ID"="IA1"."WORKFLOW_INSTANCE_ID")
23 - access("IA1"."YEAR"=TO_NUMBER(:V_YEAR) AND "IA1"."MONTH"=:V_MONTH)
25 - filter(:V_EXAMINER_NAME IS NULL OR UPPER("TITLE"||' '||"FIRSTNAME"||' '||"LASTNAME") LIKE :V_SEARCH_EXAMINER_NAME)
26 - access("EXNAME"."EXAMINER_CODE"="PERSON_CODE")
53 rows selected

Hi,
please find the below rigjt explan paln.
PLAN_TABLE_OUTPUT
SQL_ID 2ct41vyyzqyh7, child number 0
SELECT * FROM    (SELECT q.*,      COUNT(*) OVER() AS record_count,      ROWNUM          AS row_num    FROM      (SELECT
ExName.examiner_code,        examiner_name,        :v_year,        :v_month,        count_fb,        NVL(count_entered_fb,
0) count_entered_fb,        NVL(count_sent_fb, 0) count_sent_fb,        NVL(count_edited_fb, 0) count_edited_fb,
NVL(count_complete_fb, 0) count_complete_fb,        NVL(count_withibcardiff_fb, 0) count_withibcardiff_fb      FROM
(SELECT examiner_code,          COUNT(*) AS count_fb        FROM          (SELECT
       examiner_code,            paper_code,            assessment_school          FROM            ( SELECT DISTINCT
ce.examiner_code,              ce.paper_code,              ce.assessment_school            FROM              (SELECT
                        DISTINCT assessment_school,
paper_code,                examiner
Plan hash value: 651311258
| Id | Operation                                | Name                           | Rows | Bytes |TempSpc| Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                         |                                |       |       |       | 2785 (100)|          |
|* 1 | FILTER                                  |                                |       |       |       |            |          |
|* 2 |   VIEW                                   |                                |     4 | 1104 |       | 2785   (7)| 00:00:43 |
|   3 |    WINDOW BUFFER                         |                                |     4 | 1000 |       | 2785   (7)| 00:00:43 |
|   4 |     COUNT                                |                                |       |       |       |            |          |
|   5 |      VIEW                                |                                |     4 | 1000 |       | 2785   (7)| 00:00:43 |
|   6 |       NESTED LOOPS                       |                                |     4 |   476 |       | 2785   (7)| 00:00:43 |
|   7 |        MERGE JOIN OUTER                  |                                |     4 |   368 |       | 2781   (7)| 00:00:43 |
|   8 |         VIEW                             |                                |     4 |    80 |       |    72   (3)| 00:00:02 |
|   9 |          SORT GROUP BY                   |                                |     4 |    28 |       |    72   (3)| 00:00:02 |
| 10 |           VIEW                           |                                |     4 |    28 |       |    72   (3)| 00:00:02 |
| 11 |            SORT UNIQUE                   |                                |     4 |   508 |       |    72   (3)| 00:00:02 |
| 12 |             NESTED LOOPS                 |                                |     4 |   508 |       |    71   (2)| 00:00:02 |
|* 13 |              HASH JOIN                   |                                |     1 |    68 |       |    44   (3)| 00:00:01 |
|* 14 |               TABLE ACCESS BY INDEX ROWID| SUBJECT_COMPONENT              |    13 |   520 |       |    40   (0)| 00:00:01 |
|* 15 |                INDEX RANGE SCAN          | SUBJECT_COMPONENT_ASSESS_TYPE | 1059 |       |       |     9   (0)| 00:00:01 |
|* 16 |               INDEX RANGE SCAN           | SUBJECT_GROUP_PK               |    41 | 1148 |       |     3   (0)| 00:00:01 |
|* 17 |              INDEX RANGE SCAN            | CEA_AUTOMATIC_ALLOCATION_STATS |    30 | 1770 |       |    27   (0)| 00:00:01 |
|* 18 |         SORT JOIN                        |                                |   576 | 41472 |       | 2709   (7)| 00:00:42 |
| 19 |          VIEW                            |                                |   576 | 41472 |       | 2708   (7)| 00:00:42 |
| 20 |           SORT GROUP BY                  |                                |   576 | 21312 |       | 2708   (7)| 00:00:42 |
|* 21 |            HASH JOIN                     |                                | 52408 | 1893K| 1744K| 2701   (7)| 00:00:41 |
|* 22 |             TABLE ACCESS FULL            | IA_INSTANCES                   | 52408 | 1125K|       | 1263   (6)| 00:00:20 |
| 23 |             TABLE ACCESS FULL            | WORKFLOW_INSTANCE              | 1075K|    15M|       |   960   (7)| 00:00:15 |
|* 24 |        TABLE ACCESS BY INDEX ROWID       | PERSON                         |     1 |    27 |       |     1   (0)| 00:00:01 |
|* 25 |         INDEX UNIQUE SCAN                | PERSON_PK                      |     1 |       |       |     0   (0)|          |
Predicate Information (identified by operation id):
   1 - filter(TO_NUMBER(:V_START_ROW)<=TO_NUMBER(:V_START_ROW)+(TO_NUMBER(:V_MAX_ROW)-1))
   2 - filter(("ROW_NUM">=TO_NUMBER(:V_START_ROW) AND "ROW_NUM"<=TO_NUMBER(:V_START_ROW)+(TO_NUMBER(:V_MAX_ROW)-1)))
13 - access("SC"."SUBJECT"="SG"."SUBJECT" AND "SC"."LVL"="SG"."LVL")
14 - filter(((:V_SUBJECT IS NULL OR "SC"."SUBJECT"=:V_SUBJECT) AND ("SC"."LVL"=:V_LVL OR :V_LVL IS NULL)))
15 - access("SC"."YEAR"=TO_NUMBER(:V_YEAR) AND "SC"."MONTH"=:V_MONTH)
16 - access("SG"."YEAR"=TO_NUMBER(:V_YEAR) AND "SG"."MONTH"=:V_MONTH)
       filter((:V_SUBJECT_GROUP IS NULL OR "SG"."GROUP_NUMBER"=TO_NUMBER(:V_SUBJECT_GROUP)))
17 - access("CEA"."YEAR"=TO_NUMBER(:V_YEAR) AND "CEA"."MONTH"=:V_MONTH AND "SC"."PAPER_CODE"="PAPER_CODE" AND
              "CEA"."ELEMENT"='Moderation of IA')
       filter(("CEA"."ELEMENT"='Moderation of IA' AND (:V_PADDED_EXAMINER_CODE IS NULL OR
              "EXAMINER_CODE"=:V_PADDED_EXAMINER_CODE)))
18 - access("EXNAME"."EXAMINER_CODE"="IAF"."EXAMINER_CODE")
       filter("EXNAME"."EXAMINER_CODE"="IAF"."EXAMINER_CODE")
21 - access("WFI"."INSTANCE_ID"="IA1"."WORKFLOW_INSTANCE_ID")
22 - filter(("IA1"."MONTH"=:V_MONTH AND "IA1"."YEAR"=TO_NUMBER(:V_YEAR)))
24 - filter((:V_EXAMINER_NAME IS NULL OR UPPER("TITLE"||' '||"FIRSTNAME"||' '||"LASTNAME") LIKE :V_SEARCH_EXAMINER_NAME))
25 - access("EXNAME"."EXAMINER_CODE"="PERSON_CODE")
66 rows selected

ThinkVantage Performance Issues - Remove?

Hi, It looks like a lot of people have had the slow performance issues that I have experienced with my X61 tablet. These stem around running or trying to run any of the ThinkVantage programs. They take FOREVER!!!! I can't even get my access connections to open at all anymore! After doing a BIOS update and the recommended updates, I am bewildered and report that the performance issues remain.
In concept, the ThinkVantage SW is great. In execution it is an embarrassment and has wasted too many hours of my life to count. I would never have purchased this tablet if I had known about this OR would have looked into running it without ThinkVantage BEFORE I was in the situation I am in now. Has anyone else removed ThinkVantage completely? Is it even possible as par tof it looks to be embedded over BIOS. Thanks for any advice!!
Six

You can use the Thinkpad without any Thinkvantage software if you want to. Since Thinkvantage is a lot of things i'm not sure what software you find to slow down the computer. I'm not sure if you use the pre-installed OS or did a clean install, but since the Thinkpads are filled with stuff i don't need/want i never even tried to use the pre-installed OS and used a standard Windows CD/DVD to install a clean windows installation. Then i installed the drivers and only the Thinkvantage software i want which i find to work better then using the pre-installed OS. I never really figured why Lenovo sell business laptops with that much stuff pre-installed like Norton Antivirus which is not even mean't for corporate use.
What Thinkvantage software you need and want is really up to you. Stuff like message center, client security solution, productivity center and help center are some examples of the stuff i find pretty useless. Some people might disagree though. Access Connections i actually think is pretty good, but i don't need the features so don't use it. I would recommend to install only what you find useful and need then uninstall the software you don't need/want. Even if it's a bit of work i always prefer to do a new clean installation of Windows as well.
Message Edited by gan on 02-18-2009 12:23 AM

Performance issues with dynamic action (PL/SQL)

Hi!
I'm having perfomance issues with a dynamic action that is triggered on a button click.
I have 5 drop down lists to select columns which the users want to filter, 5 drop down lists to select an operation and 5 boxes to input values.
After that, there is a filter button that just submits the page based on the selected filters.
This part works fine, the data is filtered almost instantaneously.
After this, I have 3 column selectors and 3 boxes where users put values they wish to update the filtered rows to,
There is an update button that calls the dynamic action (procedure that is written below).
It should be straight out, the only performance issue could be the decode section, because I need to cover cases when user wants to set a value to null (@) and when he doesn't want update 3 columns, but less (he leaves '').
Hence P99_X_UC1 || ' = decode(' || P99_X_UV1 ||','''','|| P99_X_UC1 ||',''@'',null,'|| P99_X_UV1 ||')
However when I finally click the update button, my browser freezes and nothing happens on the table.
Can anyone help me solve this and improve the speed of the update?
Regards,
Ivan
P.S. The code for the procedure is below:
create or replace
PROCEDURE DWP.PROC_UPD
(P99_X_UC1 in VARCHAR2,
P99_X_UV1 in VARCHAR2,
P99_X_UC2 in VARCHAR2,
P99_X_UV2 in VARCHAR2,
P99_X_UC3 in VARCHAR2,
P99_X_UV3 in VARCHAR2,
P99_X_COL in VARCHAR2,
P99_X_O in VARCHAR2,
P99_X_V in VARCHAR2,
P99_X_COL2 in VARCHAR2,
P99_X_O2 in VARCHAR2,
P99_X_V2 in VARCHAR2,
P99_X_COL3 in VARCHAR2,
P99_X_O3 in VARCHAR2,
P99_X_V3 in VARCHAR2,
P99_X_COL4 in VARCHAR2,
P99_X_O4 in VARCHAR2,
P99_X_V4 in VARCHAR2,
P99_X_COL5 in VARCHAR2,
P99_X_O5 in VARCHAR2,
P99_X_V5 in VARCHAR2,
P99_X_CD in VARCHAR2,
P99_X_VD in VARCHAR2
) IS
l_sql_stmt varchar2(32600);
p_table_name varchar2(30) := 'DWP.IZV_SLOG_DET';
BEGIN
l_sql_stmt := 'update ' || p_table_name || ' set '
|| P99_X_UC1 || ' = decode(' || P99_X_UV1 ||','''','|| P99_X_UC1 ||',''@'',null,'|| P99_X_UV1 ||'),'
|| P99_X_UC2 || ' = decode(' || P99_X_UV2 ||','''','|| P99_X_UC2 ||',''@'',null,'|| P99_X_UV2 ||'),'
|| P99_X_UC3 || ' = decode(' || P99_X_UV3 ||','''','|| P99_X_UC3 ||',''@'',null,'|| P99_X_UV3 ||') where '||
P99_X_COL ||' '|| P99_X_O ||' ' || P99_X_V || ' and ' ||
P99_X_COL2 ||' '|| P99_X_O2 ||' ' || P99_X_V2 || ' and ' ||
P99_X_COL3 ||' '|| P99_X_O3 ||' ' || P99_X_V3 || ' and ' ||
P99_X_COL4 ||' '|| P99_X_O4 ||' ' || P99_X_V4 || ' and ' ||
P99_X_COL5 ||' '|| P99_X_O5 ||' ' || P99_X_V5 || ' and ' ||
P99_X_CD || ' = ' || P99_X_VD ;
--dbms_output.put_line(l_sql_stmt);
EXECUTE IMMEDIATE l_sql_stmt;
END;

Hi Ivan,
I do not think that the decode is performance relevant. Maybe the update hangs because some other transaction has uncommitted changes to one of the affected rows or the where clause is not selective enough and needs to update a huge amount of records.
Besides that - and I might be wrong, because I only know some part of your app - the code here looks like you have a huge sql injection vulnerability here. Maybe you should consider re-writing your logic in static sql. If that is not possible, you should make sure that the user input only contains allowed values, e.g. by white-listing P99_X_On (i.e. make sure they only contain known values like '=', '<', ...), and by using dbms_assert.enquote_name/enquote_literal on the other P99_X_nnn parameters.
Regards,
Christian

Select List Performance Issue in Apex 3.1.2

Hi
It would of great help if you could suggest us for the following
We are facing some issues in Select List performance in Apex 3.1.2 version.
We have 6 select list and all have been cascaded i.e., values of each select list based on pervious list value.
Values in each select list are huge. Because of this, the performance is very slow.
It takes huge time to fetch the data based on other list values.
We cross verified in backend, the same query takes less time compared to the Application.
Any recommedation to fine tune this?
Thanks in advance
Vijay

if your select lists are very huge then it could be the browser that is causing the slow down.
try and create an example using a static HTML file containing a select list of the same size and you may find the same performance issue.
a quick way to create the test would be to save the source of your APEX page as a html file
Craig
[http://www.oracleapplicationexpress.com]

After Effects CS5.5 - Very Serious Performance Issues w/RAM Preview

My system: Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800.
Problem: RAM Preview in CS5.5 gives me less than 2 fps (yes---two frames per second). This is even with the most simple of compositions. I created a 1080p 23.976 project with two simple solid layers and keyframed position and scale values for one of them with no other effects on either solid. RAM Preview gives me 1.8 fps.
I still have AE CS5 installed and it gives me solid, predictable results with RAM Preview. When I create a similar test project inside CS5, it creates the RAM preview almost instantly and displays in proper realtime (23.976 fps).
My settings for both CS5 and CS5.5 are similar (and I have tried many variations in my attempt to fix this problem).
PREVIEWS
Fast Previews: Adaptive Resolution Limit 1/4
Enabled OpenGL and both sub-options for OpenGL enabled.
MEMORY & MULTIPROCESSING
RAM reserved for other apps: 4GB
I have tried various settings for Multiprocessing, all of which results in the same less-than-2 fps RAM Previews. Currently I have MP'ing enabled with 1.5GB allocation per background CPU and the actual CPU's used is 4. Again, no matter what I set it to, I get the same performance issue.
On my screen magnification ratio setting, I am using 25% and my Resolution/Down Sample is set to quarter. On my preview tab, I have tried setting my resolution from the default of "Auto" to "Quarter" with no difference.
In summary: On the same machine, AE CS5.5 RAM Preview offers terrible performance; CS5 RAM Preview offers great performance.

Under AJA Preview there are check boxes, one for "Video" and the other for "Preview." I've checked and unchecked them both and I'm still getting poor RAM previews. No matter what I have toggled, I seem to get between 1 and 2 fps for my RAM Previews.
I am not currently using the AJA card for anything. I will consider uninstalling it if this might possibly solve my problem. It's just a hassle to install and uninstall cards on a per need basis.
If there are any other thoughts, I'd love to hear them. At this point, I'd do just about anything to have realtime previews back.
The machine I'm using, by the way, is an HP z800 with Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800. It has the following installed: CS5.5 Production Premium, AVID Media Composer 5.5.2, and AVID DS 10.5.1 (among other programs).

Performance issue in guest access anchored in DMZ

Hello,
I've been having performance issue in our wifi guest network anchored in the DMZ.
I have 3-5508 anchor controllers behind the Checkpoint gaia firewall and have 24 guest SSIDs in here.
Right now, only 14 guest SSIDs are enabled and tunnelled out in this anchor DMZ setup, whenever I try to add few more SSIDs I run into performance issue.
It seems to me that the problem is not about these additional SSIDs that I add because the performance issue starts to appear only when the traffic peaks or associated clients reached to certain number which is in my case 4000 users.
The firewall serves as the NAT device and gateway for all these guest SSIDs. The cpu, memory, number of connections have been checked and verified low.
Has anyone seen a problem like this? or has a setup like mine?
thanks!

Presuming you're not exceeding client count maximums on the individual WLCs I can't say I've seen anything in line with this "specific problem", but anything is possible.
What are the specific "performance issues" the clients are experiencing? Is it just general poor performance (slow web browsing/etc) or do you see other issues like no internet connectivity at all or something else?
May I ask, what is the use-case behind having 24 SSIDs on your anchors?

Oracle CPU Jan 2009 cause performance issue

I did installed Oracle CPU Jan 2009 on HP-UX machine. But once the installation is completed, users complaint saying that it takes more than 1 minutes to open a new ticket on that application. With this, it cause a backlog processess increase tremendously.
Will the CPU Jan 2009 patch cause any of the network performance issue:
Server: HP-UX Itanium 64 bit
Database: Oracle 10.2.0.3.0
Instances: 2 instances running on this server.
Edited by: user3858134 on Oct 26, 2009 9:30 PM

I believe the latest CPU Patch for Oracle 10.2.0.3 on HP is CPU Jan 2009 only.Don't you think your database should be on 10.2.0.4?
Anyways, do you have any benchmark statspack/AWR report? Can you compare that with the latest one? Do you see any difference?
Regards,
S.K.

Database performance issue (8.1.7.0)

Hi,
We are having tablespace "payin" in our database (8.1.7.0) .
This tablespace is the main Tablespace of our database which is dictionary managed and heavily accessed by the user SQL statements.
Now we are facing the database performance issue during the peak time (i.e. at the month end) when no. of users use to run the no. of large reports.
We have also increased the SGA sufficiently on the basis of RAM size.
This tablespace is heavily accessed for the reports.
Now my question is,
Is this performance issue is because the tablespace is "dictionary managed" instead of locally managed ?
because when i monitor the different sessions through OEM, the no. of hard parses is more for the connected users.
Actually the hard parses should be less.
In oracle 8.1.7.0 Can we convert dictionary managed tablespace to locally managed tablespace ?
by doing so will the problem will get somewhat resolve ? will it reduce the overhead on the dictionary tables and on the shared memory ?
If yes then how what is procedure to convert the tablespace from dictionary to locally managed ?
With Regards

If your end users are just running reports against this tablespace, I don't think that the tablespace management (LM/DM) matters here. You should be concerned more about the TEMP tablespace (for heavy sort operations) and your shared pool size (as you have seen hard parses go up).
As already stated, get statspack running and also try tracing user sessions with wait events. Might give you more clues.

BAPI Performance Issue - 'BAPI_PBSRVAPS_CHANGEKEYFIGVAL'?

Hi,
I am using the following BAPI to change the Key figure value . I am using the following Export combinations .
I am not sure but still the BAPI performance issues we are facing. Is anything else we can use the steps to improve the performance of following BAPI.?
Also do need to pass more export paramters for the same ? If yes, please share the same how to use that.
CALL FUNCTION 'BAPI_PBSRVAPS_CHANGEKEYFIGVAL'
    EXPORTING
      PLANNINGBOOK                      = PLANNING_BOOK
     DATA_VIEW                         =
     SELECTION_ID                      =
     LOGICAL_SYSTEM                    =
     BUSINESS_SYSTEM_GROUP             =
     SOURCE_PARTNER                    =
     TARGET_PARTNER                    =
      COMMIT_CONTROL                    = 'E'
Appreciated your inputs regarding the same.
Thank you - Prasad.

Thank you Emmanuel for the response.
Please see my comments below.
1. How much data are you passing to the BAPI? (e.g. how many combinations
Comment : - Min record size is of 6000 records in a file and more .
2) Are you calling the BAPI just once or multiple times?
Comment : - No I am calling BAPI for only once.
3) Are you writing into a very detailed level or an aggregate level?
Comment : The combination in file used - Product , Location and Key figure Value.
4) What planning book are you writing on? Does it contain a lot of KFs?
Comment : There are couple of Key figures in the planning book.
Please let me know if you have any information on this
Thank You - Prasad.

ABAP performance issues and improvements

Hi All,
Pl. give me the ABAP performance issue and improvement points.
Regards,
Hema

Performance tuning for Data Selection Statement
For all entries
The for all entries creates a where clause, where all the entries in the driver table are combined with OR. If the number of
entries in the driver table is larger than rsdb/max_blocking_factor, several similar SQL statements are executed to limit the
length of the WHERE clause.
The plus
Large amount of data
Mixing processing and reading of data
Fast internal reprocessing of data
Fast
The Minus
Difficult to program/understand
Memory could be critical (use FREE or PACKAGE size)
Some steps that might make FOR ALL ENTRIES more efficient:
Removing duplicates from the the driver table
Sorting the driver table
      If possible, convert the data in the driver table to ranges so a BETWEEN statement is used instead of and OR statement:
      FOR ALL ENTRIES IN i_tab
        WHERE mykey >= i_tab-low and
              mykey <= i_tab-high.
Nested selects
The plus:
Small amount of data
Mixing processing and reading of data
Easy to code - and understand
The minus:
Large amount of data
when mixed processing isnt needed
Performance killer no. 1
Select using JOINS
The plus
Very large amount of data
Similar to Nested selects - when the accesses are planned by the programmer
In some cases the fastest
Not so memory critical
The minus
Very difficult to program/understand
Mixing processing and reading of data not possible
Use the selection criteria
SELECT * FROM SBOOK.
CHECK: SBOOK-CARRID = 'LH' AND
                  SBOOK-CONNID = '0400'.
ENDSELECT.
SELECT * FROM SBOOK
WHERE CARRID = 'LH' AND
        CONNID = '0400'.
ENDSELECT.
Use the aggregated functions
C4A = '000'.
SELECT * FROM T100
WHERE SPRSL = 'D' AND
        ARBGB = '00'.
CHECK: T100-MSGNR > C4A.
C4A = T100-MSGNR.
ENDSELECT.
SELECT MAX( MSGNR ) FROM T100 INTO C4A
WHERE SPRSL = 'D' AND
       ARBGB = '00'.
Select with view
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
SELECT SINGLE * FROM DD01T
    WHERE   DOMNAME    = DD01L-DOMNAME
        AND AS4LOCAL   = 'A'
        AND AS4VERS    = DD01L-AS4VERS
        AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
SELECT * FROM DD01V
WHERE DOMNAME LIKE 'CHAR%'
       AND DDLANGUAGE = SY-LANGU.
ENDSELECT.
Select with index support
SELECT * FROM T100
WHERE     ARBGB = '00'
       AND MSGNR = '999'.
ENDSELECT.
SELECT * FROM T002.
SELECT * FROM T100
    WHERE     SPRSL = T002-SPRAS
          AND ARBGB = '00'
          AND MSGNR = '999'.
ENDSELECT.
ENDSELECT.
Select Into table
REFRESH X006.
SELECT * FROM T006 INTO X006.
APPEND X006.
ENDSELECT
SELECT * FROM T006 INTO TABLE X006.
Select with selection list
SELECT * FROM DD01L
WHERE DOMNAME LIKE 'CHAR%'
        AND AS4LOCAL = 'A'.
ENDSELECT
SELECT DOMNAME FROM DD01L
INTO DD01L-DOMNAME
WHERE DOMNAME LIKE 'CHAR%'
       AND AS4LOCAL = 'A'.
ENDSELECT
Key access to multiple lines
LOOP AT TAB.
CHECK TAB-K = KVAL.
ENDLOOP.
LOOP AT TAB WHERE K = KVAL.
ENDLOOP.
Copying internal tables
REFRESH TAB_DEST.
LOOP AT TAB_SRC INTO TAB_DEST.
APPEND TAB_DEST.
ENDLOOP.
TAB_DEST[] = TAB_SRC[].
Modifying a set of lines
LOOP AT TAB.
IF TAB-FLAG IS INITIAL.
    TAB-FLAG = 'X'.
ENDIF.
MODIFY TAB.
ENDLOOP.
TAB-FLAG = 'X'.
MODIFY TAB TRANSPORTING FLAG
           WHERE FLAG IS INITIAL.
Deleting a sequence of lines
DO 101 TIMES.
DELETE TAB_DEST INDEX 450.
ENDDO.
DELETE TAB_DEST FROM 450 TO 550.
Linear search vs. binary
READ TABLE TAB WITH KEY K = 'X'.
READ TABLE TAB WITH KEY K = 'X' BINARY SEARCH.
Comparison of internal tables
DESCRIBE TABLE: TAB1 LINES L1,
                TAB2 LINES L2.
IF L1 <> L2.
TAB_DIFFERENT = 'X'.
ELSE.
TAB_DIFFERENT = SPACE.
LOOP AT TAB1.
    READ TABLE TAB2 INDEX SY-TABIX.
    IF TAB1 <> TAB2.
      TAB_DIFFERENT = 'X'. EXIT.
    ENDIF.
ENDLOOP.
ENDIF.
IF TAB_DIFFERENT = SPACE.
ENDIF.
IF TAB1[] = TAB2[].
ENDIF.
Modify selected components
LOOP AT TAB.
TAB-DATE = SY-DATUM.
MODIFY TAB.
ENDLOOP.
WA-DATE = SY-DATUM.
LOOP AT TAB.
MODIFY TAB FROM WA TRANSPORTING DATE.
ENDLOOP.
Appending two internal tables
LOOP AT TAB_SRC.
APPEND TAB_SRC TO TAB_DEST.
ENDLOOP
APPEND LINES OF TAB_SRC TO TAB_DEST.
Deleting a set of lines
LOOP AT TAB_DEST WHERE K = KVAL.
DELETE TAB_DEST.
ENDLOOP
DELETE TAB_DEST WHERE K = KVAL.
Tools available in SAP to pin-point a performance problem
      The runtime analysis (SE30)
      SQL Trace (ST05)
      Tips and Tricks tool
      The performance database
Optimizing the load of the database
Using table buffering
Using buffered tables improves the performance considerably. Note that in some cases a stament can not be used with a buffered table, so when using these staments the buffer will be bypassed. These staments are:
Select DISTINCT
ORDER BY / GROUP BY / HAVING clause
Any WHERE clasuse that contains a subquery or IS NULL expression
JOIN s
A SELECT... FOR UPDATE
If you wnat to explicitly bypass the bufer, use the BYPASS BUFFER addition to the SELECT clause.
Use the ABAP SORT Clause Instead of ORDER BY
The ORDER BY clause is executed on the database server while the ABAP SORT statement is executed on the application server. The datbase server will usually be the bottleneck, so sometimes it is better to move thje sort from the datsbase server to the application server.
If you are not sorting by the primary key ( E.g. using the ORDER BY PRIMARY key statement) but are sorting by another key, it could be better to use the ABAP SORT stament to sort the data in an internal table. Note however that for very large result sets it might not be a feasible solution and you would want to let the datbase server sort it.
Avoid ther SELECT DISTINCT Statement
As with the ORDER BY clause it could be better to avoid using SELECT DISTINCT, if some of the fields are not part of an index. Instead use ABAP SORT + DELETE ADJACENT DUPLICATES on an internal table, to delete duplciate rows.

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