How to avoid transaction overhead in oracle ?

Hi ,
My database has 85 lakhs records already, during working hours,in single minute 20 records are being inserted into my table.at the same time some users trying to fetch the data from same table .so after long wait ,i m getting script time out error . as for my knowlege oracle will not support ALTER SESSION SET ISOLATION_LEVEL READ UNCOMMITTED. is there any other way to read the data from table irrespective of insert/update/delete. i am using dynamic queries in storeprocedures to fetch the data from table.any suggestion would be very helpful . Thanks in advance.

Boss wrote:
My database has 85 lakhs records already, What on earth is a lakh? And no, telling me again won't make me remember it as I use normal English metrics daily. I suggest that you use the same when posting in a public English forum.
during working hours,in single minute 20 records are being inserted into my table.at the same time some users trying to fetch the data from same > table .so after long wait ,i m getting script time out error . That is an application problem and not an Oracle problem. Row locks are explicit locks that are caused by application SQL. Not by Oracle due to lock escalation (that does not exist in Oracle).
So a row lock means that one application says it wants to change that row - which means other application processes can read that row (readers are not blocked). However, any other application process that wants to lock that same row for change will be blocked and needs to wait for that row to be unlocked.
Oracle locking is in a nutshell as simple as this.
If you are "seeing" different behaviour, then your application code is the cause of the problem. Not Oracle.
And I would not be touching Oracle transaction isolation levels to fix problems in application code.
Is there any other way to read the data from table irrespective of insert/update/delete. No. Not needed. A row lock NEVER blocks a select on that row. Oracle provides read consistency despite locking of rows and tables. This is called multi-version consistency control.
i am using dynamic queries in storeprocedures to fetch the data from table.And that is where your code and your design fails. Dynamic code is WRONG.*
Why is it (almost ways) wrong? Never mind the fact that 99% of developers are incapable of designing and writing dynamic code (based on OTN postings here), relational data models are not dynamic. Not when correctly designed.
* Obviously dynamic code is not always wrong. But as far as the average skill level go of developers that post here, it is.

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>
Trying to catch when value from other program has changed locked value from 0 to 1 to indicate they have finished.
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>
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null

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please I need a help on this query........How to avoid the duplicate values............

Look at the posts closely:might not be needed if formatted ;)
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end;Regards
Etbin

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3) Comment out LD_ASSUME_KERNEL entries in $ORACLE_HOME/appsutil/bin/adgetlnxver.sh and $AD_TOP/bin/adgetlnxver.sh
if [ ${setflag}x = "x" -a $os = "Suse" ]; then
# LD_ASSUME_KERNEL="2.4.21"
# export LD_ASSUME_KERNEL
     os="Suse"
fi
if [ ${setflag}x = "x" -a $os = "RH" ]; then
# LD_ASSUME_KERNEL="2.4.19"
# export LD_ASSUME_KERNEL
     os = "RH"
fi
If doing a rapid install, the database startup will fail and rapidwiz will prompt to ignore or retry. At this point, edit $ORACLE_HOME/appsutil/bin/adgetlnxver.sh as shown above and click on retry. It will then run to the autoconfig step at the end and error out. Just hit cancel, edit $AD_TOP/bin/adgetlnxver.sh and run autoconfig.
On Suse, one needs compat-gdbm for libgdbm.so.2
rpm -Uhv compat-gdbm-1.8.0-7.i586.rpm
Preparing... ########################################### [100%]
1:compat-gdbm ########################################### [100%]
Also in /usr/lib run ln -s libdb.so.2 libdb.so.3
Ref:
Note:300807.1 for Suse
create symbolic link called libdb.so.2 pointing to libdb.so.3, as follows:
$ cd /usr/lib
$ ln -s libdb.so.3 libdb.so.2 (or install db1-1.85-85.1 which does the same)
Note:294043.1 for Red Hat
As per an internal Bug 4045349, this is an issue with O/S side installation of compat-db rpm.
libdb.so.3 gets installed when compat-db rpm is installed.
- The O/S installation CD would contain compat-db
e.g compat-db-4.1.25-6.i386.rpm ( may change as per your version ).
- Manually install the compat-db rpm
e..g "rpm -ivh compat-db-4.1.25-6.i386.rpm"
OR
Note:345172.1
A library is missing: libdb.so.2 is from gnome-libs-1.4.1.2.90-34.1.i386.
This error also occurs in SLES9, same cause, slightly different resolution. SLES9 comes with libdb.so.3 and libdb.so.4 but not libdb.so.2 - need to install db1-1.85-85.1 to get libdb.so.2.
4) In order to relink cplex library executables (MSC, MSO, MSR, MST, WIP, etc), edit $AD_TOP/bin/adrelinknew.sh and add the following LD option (-Wl,--noinhibit-exec) in the LINUX section:
LINUX)
LDFLAGS='-s -L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs -ldl'
DEBUG_LDFLAGS='-g -L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs -ldl'
exe_line='ELF .*executable'
SHRLIB_LD='gcc'
LD='gcc'
SHRLIB_LDFLAGS='-L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs -shared'
if test -f "/etc/redhat-release"; then
     CPP_LIBS='/usr/lib/libstdc++-2-libc6.1-1-2.9.0.so'
elif test -f "/etc/SuSE-release"; then
     CPP_LIBS='/usr/lib/libstdc++.so.2.9'
else
CPP_LIBS=''
fi
CPP='g++'
CPP_LDFLAGS='-s -L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs
set CPP_LDFLAGS='-s -L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs
to CPP_LDFLAGS='-s -L$(ORACLE_HOME)/lib -L$(ORACLE_HOME)/lib/stubs -Wl,--noinhibit-exec'
After this chance, you can apply any MRP, ASCP patch and all executables will relink correctly. You can also use adadmin to relink all executables and it completes without error.
5) Discoverer 4.1.38.08 Follow Metalink Note 280598.1 Discoverer 4i On Linux: Required Patch and Configuration for Discoverer Server Stability to use JDK 1.3.1 and oadj. I updated the autoconfig template files with this change after applying 3895177. Discoverer viewer and plus standard BIS reports all open correctly on SLES-10

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