Java Reference
In-Depth Information
Thrash-tuning
D
ESCRIPTION
:
Performance tuning is difficult without a solid baseline or
when multiple configuration parameters are changed at once between
measurements. Attempting performance tuning in these conditions can
result in similar or identical tests run several times, giving the appearance
of thrashing.
M
OST
FREQUENT
SCALE
:
Application.
R
EFACTORED
SOLUTION
NAME
:
Good Performance Methodology.
R
EFACTORED
SOLUTION
TYPE
:
Process.
R
EFACTORED
SOLUTION
DESCRIPTION
:
Good testing methodology and a
good testing environment are the primary keys. Baseline measurements
are mandatory. All tests should start from a common configuration and
change a single parameter at a time.
R
OOT
CAUSES
:
Haste, ignorance.
A
NECDOTAL
EVIDENCE
:
“What did we change for that last test?” “Didn't
we just do that?” “We're right back where we started.”
S
YMPTOMS
,
CONSEQUENCES
:
Inefficient performance testing and tuning,
longer-than-expected performance tuning cycles, and unclear results of
performance improvements.
