Performance & Tuning

Why is the roll wait time always zero for a background dialog step?

In STATS, how do you preserve selected statistical records past the stat-file age limit?

Which transaction is the recommended successor to STAD for viewing individual statistical records?

What does the EarlyWatch view of the ST03 transaction profile do that the standard view doesn't?

How does table data size guide the choice of buffering type?

What can program `RSMEMORY` change dynamically, and what stays fixed?

Which background job builds the workload aggregates from raw stat records?

What is the dispatcher wait time component of response time?

What does the ST03 “Last-Minute Load” function do?

Which standard makes weekly workload aggregates run Monday–Sunday, even where the week locally starts on Sunday?

Why doesn’t all GUI roundtrip time show up as roll wait time?

What is the Extended Passport (EPP) in a statistical record used for?

How do you change the ST03 time profile from its default night-bundling to true hourly intervals?

What does the ABAP program buffer (PXA) hold?

Why are customizing tables good candidates for table buffering?

How is GUI time (TGUI) calculated for a dialog step?

Which transaction analyzes a table's size and key-value distribution to finalize a buffering decision?

Why can't CPU time be added to the other response time components as a separate term?

After an instance restart, how long before ST02 buffer statistics become meaningful?

In a stat record’s DB tab, what “ms per row” rule of thumb flags a possible database access problem?

Why can’t ST03 workload aggregates be read with SQL, and what do you use instead?

What four conditions should a table meet to qualify for buffering?

What does the ST03 response time distribution profile answer?

From ST10 table call statistics, how do you compute a table's read/write ratio?

Which response time metric most precisely measures time spent waiting on remote function calls?

What are the three table buffering methods?

How does the roll mechanism use extended memory to pass context between work processes?

What do the two ST03 ranking lists show?

In SAP performance metrics, what does the application response time R include and exclude?

What is transaction ST03 used for?

How does SAP buffer synchronization inform other instances that a buffered table changed?

Which ST03 function helps detect that one application server is performing worse than the others?

In DBACOCKPIT, what determines whether expensive SQL statements get logged?

When does the load/generation time (TL) become significant in the response time?

In a statistical record, how can you tell a dialog step was actually a debugging session?

In the Data Dictionary technical settings, what are the three table buffering options?

What must be activated for ST06 to show historical server data (blank by default)?

On the STATS selection screen, what does the time you specify actually represent?

What can happen if SAP HANA memory usage frequently hits the allocation limit?

When do SAP buffer size parameter changes take effect, and where are they set?

Which two SAP buffers are exceptions to the “zero object swaps” goal?

What does the parameter `stat/max_files` effectively control, and what is its maximum?

What does the profile parameter `stat/level` control, and why should collection stay on?

What does the enqueue time TENQ measure, and what does it exclude?

In the response-time breakdown, how is the processing time (TP) derived?

How do stat files rotate over time?

What does transaction ST06 monitor?

Which task types in the ST03 workload overview are the main ones to review?

What is the “weekend problem” with raw statistical records?

How do you enable table-access logging in stat records, and what does the `stat/tabrec` value set?

Why is the performance data of a timed-out (TIME_OUT dump) dialog step unreliable?

Why does a work process entering PRIV (private) mode threaten performance?

What happens to the SAP HANA SQL plan cache when it fills up?

Why can today’s system-wide (TOTAL) workload aggregates look stale, and how do you force an update?

When a row in a buffered table is changed, what gets invalidated for each buffering type?

Where, and in what format, are raw statistical records stored?

Why is roll-in of a transaction context cheap on modern SAP systems?

How is user-perceived response time computed from R and the frontend network time?

Why look at raw statistical records instead of just the workload aggregates?

Which two tools can an administrator use to view SAP HANA performance data?

In which transaction can you see that dialog work processes have gone into PRIV mode?