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Advanced Oracle Troubleshooting Session - PGA/UGA memory fragmentation
A troubleshooting session at one of my clients started with the following description of the problem:In some specific database environments sometimes (but not always) a particular batch process takes...
View ArticleLargest Tables Including Indexes and LOBs
Just a quick code snippit. I do a lot of data pumps to move schemas between different databases; for example taking a copy of a schema to an internal database to try to reproduce a problem. Some of...
View ArticleLargest Tables Including Indexes and LOBs
Just a quick code snippit. I do a lot of data pumps to move schemas between different databases; for example taking a copy of a schema to an internal database to try to reproduce a problem. Some of...
View ArticleLargest Tables Including Indexes and LOBs
Just a quick code snippit. I do a lot of data pumps to move schemas between different databases; for example taking a copy of a schema to an internal database to try to reproduce a problem. Some of...
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LOBs from afar
This has always been a nuisance. There you are – getting all the bells and whistles with LOBs…until a database link enters the room read more
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Those pesky LONG columns
There was a time, many moons ago when CLOB, BLOB and BFILE did not exist as data types. So if you had anything longer than a few kilobytes of data to store, you had to use a LONG or a LONG RAW. But...
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Datatype conversion laziness … yet another reason
I’ve got two words to describe my thoughts on being lazy with data types …. JUST DON’T! There’s been many blog posts, videos, AskTOM questions etc over the years with numerous examples of how the...
View ArticleLOBs vs Data – when compression occurs
Just a quick tip for SECUREFILE lobs.You may be familiar with basic compression on data in tables. It is a dictionary attribute of the table, which is then taken into account when you perform:a SQL...
View ArticleCompressed LOB–my table got bigger?
We had an interesting question on AskTOM the other day about LOB compression. Someone was very concerned that after applying compression to the LOBS in the column of their table, the table actually got...
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