Restrictions and Usage Rules
Below are known requirements that could influence the standard formats of ASE:
Account strings cannot exceed 128 characters and must be able to accommodate any Performance
Be aware that the account string character count includes:
Separation characters, such as colons (:) in time fields and slashes (/) in dates.
If a string consists of all the ASE variables, the result is 32 characters long. If
an account string exceeds the character limit, characters to the right of the limit
Performance group names.
You can intersperse ASE variables with literals, subject to the constraints of length
and of position relative to performance group controls.
To the greatest extent possible and appropriate, request level usage detail should
be captured. If DBQL is enabled, however, ASE becomes less important as a mechanism
for enabling request level usage detail since DBQL can capture usage for queries.
Recommendation for account string setup: $H1$WXYZ&S&D&H, where:
$H1$ = Performance Group PG
WXYZ = Work Group Identifier
&S&D&H = ASE Variables for session, date, and hour
Where possible, associate usage detail to higher-level aggregation for production
batch processing, such as to the job or job step level.
For requests requiring short response time, the account string setup should not materially
impact the performance of the request.
Provide the detailed information necessary to effectively manage the system. When
consistently adhered to, the proper information will be captured to facilitate a wide
variety of analyses and produce a set of standard metrics by which to measure the
When combining ASE variables, keep the following in mind:
You can use multiple ASE variables in any order in the account string following the
first ASE variable.
The account string limit is 128-characters.
Although it is perfectly legal to combine the &H and &T options, the information collected
If you specify &H or &T without &D, statistics collected on one day at one time are
combined with statistics collected on other days at that same time.