Performance Analysis & Workload Monitor

What does the response time equation R = TW + TP + TDB + TDBP + TRW + TRI + TENQ + TL decompose?

What is wait time TW, and when does it accrue?

What does database time TDB include besides SQL execution in HANA?

What is roll wait time TRW, and why is it always zero for background steps?

In ABAP systems, what counts as a 'dialog step' for online, background, RFC, web, and update workloads?

What is enqueue time TENQ, and what's the common misunderstanding about it?

Why is CPIC/RFC time a better metric than roll wait time for measuring RFC waiting?

What does the system record for every dialog step, and where is it stored (and why not in tables)?

What does the hourly job SAP_COLLECTOR_FOR_PERFMONITOR do?

How long are raw stat records kept, and what does SAP recommend for production?

How often do instance vs TOTAL workload aggregates update, and how do you force TOTAL?

What does Transaction ST03 (ST03N) do?

What does the ST03 workload overview show, and what are the key task types?

What does the ST03 memory profile show, and what is a 'reservation'?

What does the ST03 response time distribution show, and which task types is it most useful for?

What two transactions analyze raw statistical records, and why analyze raw records at all?

What's a reasonable rule of thumb for average database read time per row, and what does a higher value signal?

What does the Extended Passport in a STATS record identify, and why does it matter?

Why are table access statistics off by default, and how do you enable them temporarily?

What can STATS do that its predecessors couldn't, regarding data retention?

Where does response time R start and stop being measured, and what does it exclude for online transactions?

What is roll-in time TRI, and what changed about the roll mechanism in S/4HANA?

What does the ST03 time profile show, and how do you get full hourly granularity?

In the ST03 transaction profile, how do the Standard and EarlyWatch views differ?

What does the ST03 last-minute load function do, and when is it useful?

Double-clicking a STATS record, what do the Time and DB tabs show?

Which parameter enables statistical record collection, and why does SAP say to leave it on?

What are roundtrips, and what does GUI time TGUI measure?

What is processing time TP, and why is it hard to interpret?

How does user response time (RUSER) differ from application response time R?

A large gap between processing time and CPU time means what, and what causes should you check?

When does a weekly workload aggregate start and end, and who should note this?

What do the ST03 ranking lists show, and when are they especially useful?

How configurable is ST03 workload data retention, and why increase the defaults?

In STATS, what does the period you specify represent, and how does that help find a long-running job?