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Go Back  dBforums > Database Server Software > DB2 > Backup Delays

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Old 11-17-05, 10:50
venky5436 venky5436 is offline
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Question Backup Delays
I am using DB2 V7.1.I just came across a problem where the backup has taken 1 hr more than the usual daily backup time reqd.Can anyone please throw some light onto this WHY has this happened and WHERE do I look for to solve this issue and the solution to it.
Your help will be appreciated
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Old 11-17-05, 10:57
wangzhonnew wangzhonnew is offline
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online backup? offline backup?
checked disk usage/mem usage/CPU usage?
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Old 11-17-05, 11:12
venky5436 venky5436 is offline
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Its An Online Backup
Thanks for the quick response .Its An Online Backup
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Old 11-17-05, 11:47
J Petruk J Petruk is offline
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Online backups require locks, so could there have been other applications running that caused more lock-wait conditions than usual?
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Old 11-17-05, 11:57
venky5436 venky5436 is offline
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Thanks Jonathan
Your reply was exactly right .There were some applications going on at that time.Thanks again.
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Old 11-17-05, 12:01
wangzhonnew wangzhonnew is offline
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the speed of an online backup depends on the database usage and the disk and system activity.
regarding the performance of DB2 backups, the subject is covered in the IBM Redbook called : "DB2 UDB ESE V8 non-DPF Performance Guide for High Performance OLTP and BI", chapter 4.2. Please take a look. This book is available online at:
http://www.redbooks.ibm.com/abstracts/SG246432.html
Also increase your DB CFG parm UTIL_HEAP_SZ accordingly to the buffer size specified in your backup command.
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