1 Performance Data: What is Important and How Do I Make Sense of It Adam Backman A Nice Guy, DBAppraise

2 Agenda Why do you need a monitor? Monitoring Alternatives What Are VSTs? Basic Capabilities Advanced Features

3 Monitoring Tools/Services Free – Glance – TOP – PROMON – ProTop Not Free – OpenEdge Management – ProMonitor – DBAppraise

4 What Are VSTs? V irtual S ystem T ables A 4GL View of Progress Data Structures (the same as those shown in PROMON.) No Performance Impact (mostly) Primarily Read-Only Knowing what to use can be a challenge

5 Some VST Quirks Updateable: – _startup._spin – Private buffers Table & Index Ranges: -tablebase, -tablerangesize -indexbase, -indexrangesize – Table & Index Window can be reset! Quirky Keys: – _myconnection… – _tablestat & _indexstat

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7 Basic Capabilities Summary Data Blocked Clients & Open Transactions Table & Index Activity User Activity Storage Area Capacity Estimating Big B Latches & Resources Clients & Servers

8 Summary Data 11:32:52 ProTop xvi -- Progress Database Monitor 07/05/05 Sample sports [/db/sports] Rate Hit Ratio: 182:1 195:1 Commits: Sessions: 2057 Miss% : 0.549% 0.512% Latch Waits: Local: 953 Hit% : 99.45% 99.48% Tot/Mod Bufs: Remote: 956 Log Reads: Evict Bufs: 2 1 Batch: 1045 OS Reads: Lock Table: Server: 97 Rec Reads: LkHWM|OldTrx: :00 Other: 51 Log/Rec: Old/Curr BI: TRX: 26 Area Full: % After Image: Disabled Blocked: 0

9 Sample, Summary, Rate & Raw Data BaseValue LastValue ThisValue SampleTime SummaryTime SampleRate = (ThisValue – LastValue) / SampleTime. SummaryRate = (ThisValue – BaseValue) / SummaryTime. SampleRaw = (ThisValue – LastValue). SummaryRaw = (ThisValue – BaseValue).

10 Blocked Sessions Usr Name Note tom REC XQH 102 [Order] julia

11 Locked Records for each _Lock no-lock while _Lock-usr <> ?: if _Lock-recid = _Connect-wait1 then do: find _file where _file._file-num = _Lock-table no-error. bxtbl = _file._file-name. end. if _Lock-usr = _Connect-usr then bxwait = bxwait + “ “ + _Lock-flags. else bxque = bxque + " " + _Lock-name. end. bxnote = bxtbl + bxwait + bxque.

12 Open Transactions Usr Name TRX Num BI Clstr Start Trx Stat Duration Wait root :39:05 ACTIVE 00:00: root ALLOCATE 00:00: root :39:06 ACTIVE 00:00: root :39:06 ACTIVE 00:00: julia ALLOCATE 00:00: tom ALLOCATE 00:00:

13 Table Activity Table Statistics Tbl# Table Name Create Read Update Delete OrderLine Order POLine PurchaseOrder Bin Customer Invoice Employee Family

14 Table Stats /** This does NOT work if –tablebase <> 1!!! find _File no-lock where _File._File-num = p_tbl no-error. find _TableStat no-lock where _TableStat-id = p_tbl no-error. display p_tbl _file-num _TableStat-id. **/ /*** use the following: ***/ find _TableStat no-lock where _TableStat-id = p_tbl no-error. find _File no-lock where _File._File-num = _TableStat-id no-error. display p_tbl _file-num _TableStat-id.

15 Index Activity Index Statistics Idx# Index Name Create Read Split Delete BlkDel orderline PU CustNum PU _File/Field PU _Field-Name U _File/Index PU

16 Index Type find _IndexStat no-lock where _IndexStat-id = p_idx no-error. find _Index no-lock where _Index._Idx-num = _IndexStat-id no-error. find _File where recid( _File ) = _Index._File-recid no-error. tt_index.idxnote = _File._File-name + “. ” + _Index._Index-name + ( if _file._prime-index = recid(_index) then “ P" else “ " ) + ( if _index._unique then "U" else "" )

17 User IO Activity UIO Usr Name Flags PID DB Access OS Rd OS Wr Hit% tom SB % 10 jami SB % 16 julia SB % 17 peter SB % 15 emily SB % 11 tiger SB* % 14 tucker SB % 19 granite SB % 7 astro SB %

18 Estimating Big B Big B GuessTimator Pct Big B % db Size Hit:1 Miss% Hit% OS Rd % % % % % % % % % % % % % % % % 425 <= 150% % % % % % % % % % % % 213

19 Big B MissPct = 100 * ( 1 – ( LogRd – OSRd ) / LogRd )). HitPct = 100 – MissPct. OSRd = LogRd * ( MissPct / 100 ). m2 = m1 * exp(( b1 / b2 ), 0.5 ).

20 Latch Waits Id Latch Requests Waits Lock% MTL_BF % 17 MTL_BHT % 21 MTL_LRU % 10 MTL_LHT % 15 MTL_LKF % 26 MTL_BF % 27 MTL_BF % 25 MTL_BF % 4 MTL_OM %

21 Resource Waits Id Resource Locks Waits Lock% DB Buf S Lock % 6 Record Get % 7 DB Buf Read % 2 Record Lock % 11 DB Buf X Lock % 19 TXE Share Lock % 8 DB Buf Write % 21 TXE Commit Lock % 1 Shared Memory % 3 Schema Lock %

22 Servers and Clients Servers Srv Type Port Con Max MRecv MSent RRecv RSent QSent TimeSlice Login Auto Auto Server IO Srv Type Port Con Max DB Access OS Rd OS Wr Hit% Auto % 20 Auto % 18 Auto % 16 Auto %

23 Storage Area Capacity Area Statistics Area Area Name Blocks Hi Water Free %Used RPB Note Control Area % 64 3 Primary Recovery % 1 6 Schema Area % 64 i(25) ** 7 Cust_Dat % 64 t(48) 8 Cust_Idx % 64 i(157) 9 Sales_Dat % 64 t(41) 10 Sales_Idx % 64 i(125)

24 Storage Area Capacity for each _AreaStatus no-lock, _Area no-lock where _Area._Area-num = _AreaStatus._AreaStatus-Areanum: bfree = _AreaStatus-Totblocks - _AreaStatus-Hiwater. if ( _AreaStatus-Freenum <> ? ) then bfree = bfree + _AreaStatus-Freenum. if bfree = ? then bfree = _AreaStatus-totblocks. used = (( _AreaStatus-totblocks - bfree) / _AreaStatus-totblocks ) * 100. end.

25 Storage Area Contents for each _storageobject no-lock where _storageobject._area-number = xid and _storageobject._object-num > 0 and _storageobject._object-associate > 0: if _storageobject._object-type = 1 then so_tbl = so_tbl + 1. else if _storageobject._object-type = 2 then so_idx = so_idx + 1. end.

26 Balancing IO Database File IO Id Extent Name Mode Blksz Reads Writes Extends sports2000_11.d1 BUFIO sports2000_8.d1 BUFIO sports2000_11.d2 BOTHIO sports2000.db BOTHIO sports2000.d1 BOTHIO sports2000_7.d1 BUFIO sports2000_9.d1 BUFIO sports2000_10.d1 BUFIO sports2000.b1 UNBUFIO sports2000_9.d2 BOTHIO

27 A Monitoring Architecture VST Based Multi-Platform – UNIX Character – HTML – Windows GUI Using Publish & Subscribe

28 Events That A Module Handles Mon-Restart – Empty Temp-Table – Remove self from memory Mon-Init – Empty Temp-Table – Define Display Data Elements Mon-Update – Refresh Data – Calculate intervals, rates and so forth – Update UI Temp-Table with results

29 Q uestions