What are the top ten problems most frequently occurring in the real world usage of Oracle databases?
The problems that I most frequently come across can be divided into two large categories: SPACE PROBLEMS and PERFORMANCE/MEMORY MAINTENANCE PROBLEMS.
In the space problems category, you will most likely find:
- table reached its max extents
- index reached its max extents
- cannot extend tablespace because MAXSIZE reached or no space in drive
- archiving error because ARCH process did not find space to copy the archived logs
In the performance problems category, you will most likely find:
- problem in SHARE_POOL_SIZE (increase size)
- number of processes reached its max
- locking problems
- ora-1555 snapshot too old (read consistency problems)
- The big slow performance problem
Perhaps the most popular problem is when a programmer/manager comes to you and says something like "the application runs slowly -- you have a problem in the database! This is definitely the hardest problem to solve because there is no "cook book" solution.
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