Sponsored Content
Full Discussion: Executing SQL's in parallel
Top Forums UNIX for Beginners Questions & Answers Executing SQL's in parallel Post 303041089 by Corona688 on Thursday 14th of November 2019 10:09:58 AM
Old 11-14-2019
It's also important to realize that parallel can be a performance loss in some situations, especially if any of these queries are disk-intensive.
This User Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. Programming

Executing pl/sql using sqlplus on unix

Hi to all, I have a endday.sh file. And I execute this like "sh endday.sh" from command prompt. In endday.sh file it writes: sqlplus temp/temp@data @run.sql& echo $!>>pid.txt However my aim is not to put the pid into pid.txt but I need to insert the pid into an oracle table using sqlplus.... (1 Reply)
Discussion started by: maverick1234
1 Replies

2. Shell Programming and Scripting

Executing pl/sql using sqlplus on unix

Hi to all, I have a endday.sh file. And I execute this like "sh endday.sh" from command prompt. In endday.sh file it writes: sqlplus temp/temp@data @run.sql& echo $!>>pid.txt However my aim is not to put the pid into pid.txt but I need to insert the pid into an oracle table using sqlplus.... (1 Reply)
Discussion started by: maverick1234
1 Replies

3. Shell Programming and Scripting

need some help in executing sql

i am stuck with a problem ... i have a shell script that gets the file name as input and performs the following operation... it runs through a for loop inside from which i connect to sqlplus and run a procedure that creates a number of tables .. there is no space in my server so we have made... (0 Replies)
Discussion started by: sais
0 Replies

4. Shell Programming and Scripting

Executing scripts in Parallel

Hi All, I have 3 shell scripts, Script1,Script2 and Script3. Now I want to run Script1 and Script2 in parallel and Script3 should depend on successful completion of both Script1 and Script2. Could you please suggest an approach of acheiving this... Thanks in advance (2 Replies)
Discussion started by: itsme_maverick
2 Replies

5. Shell Programming and Scripting

Help with executing parallel sessions for same shell script with different but fixed parameters

Hi Experts, There is a shell script that accepts positional parameter between 1-25 to execute case statement of script depending upon the parameter passed. Now I need to run all the 25 sessions parallely. In each option of case statement it is connecting with sqlplus and executing a select... (11 Replies)
Discussion started by: Opamps123
11 Replies

6. UNIX for Advanced & Expert Users

Call parallel sql scripts from shell and return status when both sql are done

Hi Experts: I have a shell script that's kicked off by cron. Inside this shell script, I need to kick off two or more oracle sql scripts to process different groups of tables. And when both sql scripts are done, I will continue in the shell script to do other things like checking processing... (3 Replies)
Discussion started by: huasheng8
3 Replies

7. Shell Programming and Scripting

Executing two commands in parallel

Hi, I am stuck into a situation where i want to execute a command in my shell script well along with a previous command in order to achieve something but i am not figuring out a way. here is a snippet: service management restart rm -rf lock.file in the above, if you see, i am trying to... (5 Replies)
Discussion started by: sunrexstar
5 Replies

8. Shell Programming and Scripting

Parallel SQL sessions in shell script

i have 3 sqls , sql 1 and sql 2 shuld run in parallel , but sql 3 should run after completion f sql1 nd sql2, my code is as below, please suggest the changes sqlplus username1/password1@DB1 @sql >> log1 & sqlplus username2/password2@DB2 @sql2 >> log1 & how can i execute the... (7 Replies)
Discussion started by: only4satish
7 Replies

9. Shell Programming and Scripting

Executing Multiple Queries in parallel in Shell

I have n number of SQL queries needs to executed in Shell. Result of this query need to assign in a variable. Once all the queries are executed script needs to exit. Sample Query: SQL 1: Select Count(*) from TABLE GROUP BY COL1,COL2 SQL 2: Select Count(*) from TABLE GROUP BY COL1,COL2 ... (2 Replies)
Discussion started by: Niranjancse
2 Replies

10. Shell Programming and Scripting

Parallel processing of SQL through Shell

Hi Friends, I am trying to write a shell which will invoke 3 CTAS (ORACLE create table XXX as select * from YYYY). The approximate time for one CTAS is around 25 mins. So i want to run the CTAS script parallely. My pseudocode is as below. Main script nohup sh CTAS1.sh &... (3 Replies)
Discussion started by: Showdown
3 Replies
default_disk_ir(5)						File Formats Manual						default_disk_ir(5)

NAME
default_disk_ir - enable and disable use of device's write cache in the SCSI subsystem (OBSOLETE) VALUES
Failsafe Default Allowed values Recommended values DESCRIPTION
Note: This tunable is obsolete. HP no longer allows enabling, by default, write cache for all direct access devices on the system. It is still possible to enable write cache for a specific device through the command. See scsictl(1M). This tunable enables(1) or disables(0) the Immediate Reporting behavior of the SCSI subsystem, also known as Write Cache Enable (WCE). With Immediate Reporting enabled, disk drives that have data caches return from a system call, including raw writes, when the data is cached, rather than returning after the data is written to the media. This sometimes improves write performance especially for sequential transfers. Cached data can be lost if a device power failure or reset occurs before the device writes the cached data to media. Because of these risks, the recommended value for this parameter on servers is Immediate Reporting disabled(0). Although not an option to the mount command, this tunable has a profound effect upon filesystem and raw disk performance and, conversely, data integrity when system resets occur. This tunable also affects delayed-write versus write-through-filesystem behavior. Who Is Expected to Change This Tunable? Anyone. Restrictions on Changing Changes to this tunable will take effect when the device is first opened. When Should the Tunable Be Turned On? When a third party application vendor recommends it. For normal use, HP strongly recommends you don't enable this tunable. What Are the Side Effects of Turning the Tunable On? Since enabling this tunable circumvents the protections provided by LVM or RAID, there is a strong risk of filesystem corruption and data loss in case of a device power failure or reset. When Should the Tunable Be Turned Off? HP recommends you always disable this tunable. This is especially true if you don't want to take the risk of filesystem corruption and data loss in case of a device power failure or reset. What Are the Side Effects of Turning the Tunable Off? This might reduce the performance of disk write (not read) access while eliminating the risk of filesystem corruption and data loss in case of a device power failure or reset. What Other Tunables Should Be Changed at the Same Time? None. WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter has been obsoleted for HP-UX 11i Version 3. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun- able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see at AUTHOR
was developed by HP. SEE ALSO
write(2), scsi(7). OBSOLETE
Kernel Tunable Parameter default_disk_ir(5)
All times are GMT -4. The time now is 06:21 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy