Seagate ST43401N/ND Instalační příručka stáhnout pdf (Strana 98)

Test Cycle: Testing for Performance

• Data and data distribution problems. Check data layout and be sure that

these match the productions system.

• Index definitions. Verify that your reindexing scripts worked. Using

sp_helpindex, compare the index definitions of the production and test

systems.

Resolve any problems before going on.

I/O

Verify that the test server is performing the same amount of I/O. Physical and

logical I/O should be in the same proportion as in the production system. Use

statistics io output to compare.

Pre-Upgrade Multi-User Tests

When the optimizer is behaving the same as it did in the production system,

you are ready to run the following benchmarks.

• Untimed Benchmarks

• Timed Benchmarks

Untimed Benchmarks

In multi-user mode, run untimed benchmarks as often as necessary, capturing

response time and throughput metrics. Resolve:

• Differences, such as cache hit rate, to the production system

• Bottlenecks caused by saturated devices

• Other problems or mistakes

Between runs, restore your databases from backup or perform a quick reset.

Timed Benchmarks

Always restore your databases from backup so they are in a known state when

running timed benchmarks. Gather response time and throughput metrics. Run

the tests as often as necessary to fix problems and be able to reproduce the final

results.

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Seagate ST43401N/ND Instalační příručka Strana 98