How to increase my server performance ?

Question

hi experts,
my environment is 4.7E,SQL,Windows 2003 Server with 150 users.
ibm xseries 346 with 6 gb ram
min response time is 1000 (m.sec) to 1500 per 140 logon users.
how can i decrease this response time ?
Please give me your valuable suggestions.
Gayatry.

Answer 1

Hello Gayatri,
The average response time consists of:
Wait time
Database request time
Roll time
Load time
Enqueue time
Processing time is:
    ABAP processing time (part of total CPU time)
    Work process waiting for CPU
    Waiting for I/O
IN order to monitor the performance of the system and identifying the bottleneck points, use Workload Monitor transaction code ST03. Select the required timeframe and by default the ‘Workload Overview’ view is displayed. In the “Administrator’s Mode” the default time frame of the workload analysis is the current day. However, change to “Expert Mode”. Choose under “Detailed Analysis” -> “Last minutes load”
During the workload exercise, restrict the time period to the time when the performance is observed to be bad. Under Analysis views, you can access, for example:
Workload overview - Workload statistics according to work process type
Transaction Profile - Workload statistics according to transaction.
Time Profile - Workload statistics according to hour
In the Workload Monitor(ST03) selecting Transaction Profile enables you to find out:
The most-used transactions. Tuning these transactions results in the largest improvements in overall performance.
The average response times for typical R/3 transactions.
In the Workload Monitor, the following values normally indicate good performance:
Wait time < 10% response time
Average roll-in time < 20 ms
Average roll wait time < 200 ms
Average load (and generation) time < 10 % of response time (<50 ms)
Average database request time < 40 % of (response time - wait time)
Average CPU time < 40 % of (response time - wait time)
Average CPU time – should be close to processing time
Average  response time - depends on your requirements – there is no general rule
If you observe high response time for these individual components :
Large Roll-wait time: Communication problem with GUI or external system
Large load time: Program buffer, CUA buffer, or Screen buffer too small
Large database request times: CPU or memory bottleneck on database server, network problems, expensive SQL statements, database locks, missing indexes, missing statistics, small buffers
Large CPU times: Expensive ABAP processing, for example, processing large tables, frequent accessing of R/3 buffers
Processing  time much larger than CPU time: CPU bottlenecks, network problems, communication problems.
Hope this helps in tuning your system
Regards
Tanuj Gupta