SQL & PL/SQL :: Disadvantages Of Increasing INTRANS?
Nov 8, 2011
Due to an ORA-08177: can't serialize access for this transaction in our Java application using serializable transactions and after running some tests, we decided to increase INITRANS from 3 to 5 for our tables.
what would be the disadvantages from this measure? Space? I have done some tests with large tables with INITRANS 3 and 5, populated with large amounts of data and the space occupied is the same in bytes and blocks. Performance? Something else?
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Jul 13, 2010
I was wondering whether we all think of disadvantages or is it we always love the concept and use them..so recently i started out to think what may be the disadvantages of schema objects.
For example Packages has lot of advantages like Information hiding, Scope of varaibles declared in spec, dependency crisis etc, then i read somewhere that if a package is referenced then the entire package will be downloaded in the memory.
So my question is what if the package is very large would it accomdate in the memory without any leaks , i am assuming that its like LEAST RECENTLY USED mechanism. i have a question for you about disadvantages
1. Packages
2. Cursors
3. Collections, includes Associative arrays, VARRAY, nested table
4. materialized views
5. views
6. indexes
7. having more than 100 columns in a table need to spilt it or to keep in the same table.
any object can have its own disadvantages.
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Jul 23, 2012
what are disadvantages, RMAN backup in DG over production?
is it appropriate to take RMAN BACKUP in DG?
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Apr 22, 2009
I would like to know more about RUEI's history, as well as advantages and disadvantages of RUEI and its rivals.
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Oct 3, 2013
How to increase ASM DATA free size? I tried deleting expired backups and old archive logs which are backed up more than one time. Still no success ..
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Jun 21, 2012
I had created a Primary key and wanted to compress as per my senior instructions.Below are my results the size increased after compression.
select compression from dba_indexes where index_name = 'TEST_IDX';
Compression
----------
DISABLED
select sum(blocks) no_of_blocks, (sum(blocks)*8192)/(1024*1024)size_MB
[code]....
We ran a compression on the primary key index TEST_IDX
ALTER INDEX SCOTT.TEST_IDX REBUILD INITRANS 15 TABLESPACE DATA_01 COMPRESS;
ANALYZE INDEX SCOTT.TEST_IDX VALIDATE STRUCTURE;
Now when i ran the below select statement:
select compression from dba_indexes where index_name = 'TEST_IDX';
Compression
----------
ENABLED
select sum(blocks) no_of_blocks, (sum(blocks)*8192)/(1024*1024)size_MB
[code]....
As you can see after compression the blocks and size has been increased, but i ran for many tables and other indexes, we observed the blocks and size was reduced by 50-70%, i am not sure why this happened to the index compression.
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Jul 30, 2013
1.2.0.2 on RHL.. 3 Log Groups with 1 member each. db_recovery_file_dest string /oracle/oraarch For the purpose of increasing log file size, if i use ALTER DATABASE ADD LOGFILE GROUP 1 SIZE 300M; but it creates Log Group with 2 member. one is at /oracle/oraarch location and other at /oracle/oradata (db_create_file_dest).
We are using ORACLE MANAGED FILE SYSEM . I want only 1 member at /oracle/oraarch (to keep the previous setting intact ...just increasing the size from 100 to 300M). If I manually give the path where to create the logfile member, I get this error:
ALTER DATABASE ADD LOGFILE GROUP 1 '/oracle/oraarch/DB/onlinelog/' SIZE 300M;
ALTER DATABASE ADD LOGFILE GROUP 1 '/oracle/oraarch/DB/onlinelog/' SIZE 300M
*
ERROR at line 1:
ORA-00301: error in adding log file '/oracle/oraarch/DB/onlinelog/' - file cannot be created
ORA-27038: created file already exists
Additional information: 1
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Mar 7, 2010
I want to increase the size of the tablespace but when i login as sysdba or admin user i can just see the 21 tables in the dba_tablespaces or user_tablespaces. I want to see the tablespaces related to the application.
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Jan 10, 2012
After the reboots each system was using around 30 GB of memory... now that it's been up for a week memory is up to 98GB used on each system. None of the systems are swapping.
Mem: 98999084k total, 97937116k used, 1061968k free, 774900k buffers
Swap: 16779884k total, 0k used, 16779884k free, 89510312k cached
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Nov 30, 2012
Considering the below factors, I am planning to increase the buffer cache value from 256Mb to 512Mb.
1. Buffer cache hit ratio value is around 35% even in the normal period.
2. free buffer requested value is below during peak & normal hours below.
Statistic Total per Second per Trans
--------------------------------- ------------------ -------------- ------------
free buffer requested 54,694,995 15,226.9 2,523.7
free buffer requested 23,412,674 6,501.7 2,585.9
3. most of the top 5 physical reads & logical reads queries are well tuned and some of queries are doing FTS on small tables (table count min 1500 max 35000). SO indexing option is not required for these queires. But these queries getting executed frequently.
SQL> show sga
Total System Global Area 2148534928 bytes
Fixed Size 731792 bytes
Variable Size 1879048192 bytes
Database Buffers 268435456 bytes
Redo Buffers 319488 bytes
5.top 5 waitevents during db slow performance & high cpu utilization (>80%) issue.
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
-------------------------------------------- ------------ ----------- --------
latch free 1,848,898 153,793 52.00
buffer busy waits 395,280 87,201 29.49
db file scattered read 3,488,648 34,199 11.56
enqueue 4,052 10,897 3.68
CPU time 5,567 1.88
6. Top 5 waitvents during normal activities and CPU utilization is around 40%.
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
-------------------------------------------- ------------ ----------- --------
CPU time 1,860 45.32
db file scattered read 1,133,669 985 23.99
imm op 776 605 14.73
sbtinfo2 208 139 3.40
sbtbackup 2 123 3.00
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Mar 6, 2012
we are inserting a data in table by selecting data from another table.This is part of a very big procedure and the code is like
Loop
SELECTMAX(biz_trn_no) + 1
INTOv_biz_tran_no
FROMnew_business_transactions
WHEREnb_srno = nb_sr_no;
[code]....
Is there any way I can get this functionality without using a sequence? I assume corelated query would be slow and analytic.
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Apr 14, 2012
I have a table with numbers like this in a column
sr no. value
1 17
2 0
3 0
4 38
5 32
6 24
7 12
8 51
9 42
10 1
11 1
12 0
13 0
14 1
15 1
.
.
.
so on....
I want to find out consecutive non-increasing sequences of value (2nd column) order by sr. no (first column) in ascending order.
For example, in the 2nd column, 17 is followed by 0 and 0 and then 38 so it means 3 consecutive values (i.e starting from 17 are 0 and 0) are non-increasing and they are ranked by '1' in my desired in third column as shown below. similarly, the 2nd non-increasing sequence starts with 38,32,24 and 12 and this is ranked as '2' in the third column. same is the case with rank '3' for the third non increasing sequence. so bascially i want the third column with "ranks" starting and ending as per above logic. i tried using LEAD function but doesn't get what I want. I need the shortest possible query to get that third column since i have other columns in the original table in a multiple group by query.
my desired output is:
sr no. value Rank
1 17 1
2 0 1
3 0 1
4 38 2
5 32 2
6 24 2
7 12 2
8 51 3
9 42 3
10 1 3
11 1 3
12 0 3
13 0 3
14 1 4
15 1 4
.
.
.
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Dec 5, 2012
My listener.trc file has grown to a size of 56G and is contineously growing with the following message:
9:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:669] naeshow: [05-DEC-2012 19:56:49:670] naeshow: [05-DEC-2012
[code]...
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Feb 27, 2008
The size of redolog member is 12m . Can I increase the size of that member dynamically, without adding a new member to that group and dropping the old one.
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Jan 16, 2013
I am Using Oracle 11.2.0.3. I had a script that droped partitions for a table which should have dropped nearly 30 gb of data. We have data and index tablespace.
Query of dba_free_space showed no change on data tablespace. However, index tablespace showed increase in free space.
select sum(bytes / (1024 * 1024 * 1024)) "Size (GB)" from dba_free_space where tablespace_name ='&tbs_name'
I am using following command to drop partition
ALTER TABLE table_name
DROP PARTITION "partition_name"
UPDATE GLOBAL INDEXES;
What should be done to increase free space shown for tablespace after partition drop?
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Jul 6, 2012
I noticed that listener file in diag/trace is rapidly increasing. I am using 11g Rel 1 on window 2008 server Its 1 GB in couple of days. Is there any way if I can turn it off ?
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Apr 15, 2012
I started datapump not using parallel option
I issued the following command
impdp t24/t24 directory=dp_dump dumpfile=bef_cob_%U.dmp schemas=t24
The total dumpfile size is 200 GB..
Now I want to add parallel process to the job..
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Aug 26, 2013
the code for show increasing digit 1 to 100 in a text field after pressing a button 100 times?
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Oct 11, 2011
I have created a sql loader control file to load a delimeter file in a table.
The file gets loaded into the table properly, however the commit is happening for every 64 records.
My aim is to rise the commit count by 1000 records.
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Jul 13, 2012
How can in increase the allocated space for a schema in Apex Admin section?
I know you can set this when creating a schema alongsite a workspace and looks like the only way to do it is via raising a service request for more space and loggin in as ADMIN and approving it (in increments of 500MB).
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Apr 14, 2013
I understand when I decrease the width or height of the paper layout, it may cause this error if any of the objects in my report may not fit in the new layout.
But for me this error occurs even when I increase the size of my report paper layout!
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