buffer reset

[Former Member]

i want to reset buffer. how can i reset. should user locked

[markus_doehr2 · Accepted solution]

Which buffers?

Markus

[Former Member · Accepted solution]

actually i want to clear swaps.

[markus_doehr2 · Accepted solution]

You mean those you see in ST02? "clearing" the buffers won't reset them. The effect will be, that they will rather increase more...

To reset them you need to restart your system.

Markus

[Former Member · Accepted solution]

how can i incrase buffer size, and how can i check curren buffer size.

if it goes high then what will be happen

[anindya_bose · Accepted solution]

ST02------>Current Parameters This will show you the names of each buffer parameter.. From RZ10 ( Instance profile), you can change these parameters. You will need a restart of SAP to make those change effective

[markus_doehr2 · Accepted solution]

> how can i incrase buffer size, and how can i check curren buffer size.

doublclick on them, the press the button "current parameters".

> if it goes high then what will be happen

The system may be slow(er).

Markus

[Former Member · Accepted solution]

there is giving in program buffer high swaps as per it allocated..what should i do

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System: sapgrp_HOP_00 Tune summary

Date & time of snapshot: 27.08.2009 16:01:49 Startup: 11.08.2009 10:55:19

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Buffer Hitratio Allocated Free space Dir. size Free directory Swaps Database

[%] [kB] [kB] [%] Entries Entries [%] accesses

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Nametab (NTAB)

Table definition 99.91 12,800 6,511 65.42 52,000 34,013 65.41 0 62,339

Field description 99.97 84,063 22,953 28.69 52,000 34,758 66.84 0 17,521

Short NTAB 99.99 41,625 39,127 97.82 13,000 9,330 71.77 0 3,670

Initial records 99.84 121,625 117,074 97.56 13,000 1,395 10.73 5,898 17,503

Program * 98.45* * 400,000* 1,613 0.42 100,000 90,114 90.11 1,025,907 3,115,500

CUA 99.91 25,000 13,787 63.04 12,500 10,478 83.82 0 2,031

Screen 99.78 24,414 3,148 13.21 10,000 8,967 89.67 0 5,596

Calendar 99.98 488 365 76.52 200 52 26.00 0 148

OTR 100.00 4,096 3,594 100.00 2,000 2,000 100.00 0 0

Tables

Generic key 99.88 48,828 2,173 4.67 10,000 1,359 13.59 181 368,082

Single record 98.72 30,000 15,120 50.64 500 352 70.40 75 284,750

Export/import 93.35 48,000 1,373 3.39 30,000 9,244 30.81 151,929 0

Exp./Imp. SHM 91.55 4,096 3,519 97.91 2,000 1,999 99.95 0 0

SAP memory Current use Max. use In memory On disk SAP cursor cache Hitratio

[%] [kB] [kB] [kB] [kB] [%]

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Roll area 4.06 10,645 12,824 262,144 0 IDs 99.13

Paging area 1.11 11,405 86,800 131,072 892,928 Statements 95.00

Extended Memory 48.71 1,020,928 1,523,712 2,096,128

Heap Memory 0 0

Call statistics Hitratio ABAP/4 Processor Database

2643 tables buffered [%] Requests Fails Total calls AvgTime[ms] Rows affected

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Select single 96.37 84,006,576 26967,472 334,639 0.000 57,039,104

Select 82.31 109557,812 0 2,323,356 0.000 37,453,408

Insert 25,219 19,031 31,252 0.000 470,641

Update 25,943 2,172 32,762 0.000 38,889

Delete 13,607 9,758 16,174 0.000 280,569

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Total 89.34 193629,157 26998,433 2,738,183 95,282,611

[markus_doehr2 · Accepted solution]

> there is giving in program buffer high swaps as per it allocated..what should i do

> Program * 98.45* * 400,000* 1,613 0.42 100,000 90,114 90.11 1,025,907 3,115,500

Your program buffer is too small.

If this is a 32bit system you have to be careful increasing the buffer size. All buffers together plus the memory allocated by the data processed by the users must to be more than 2 GB, otherwise the system will dump.

On a 32bit system you may not be able to completely avoid buffering due to that limitation.

Markus