Help in reading DBANALYZER output -
Hi Experts
I have gotten really good results so far - now I am bottlenecked at 2/3 of the test load level. I expected
to get 3000 connection run - but at 2200 I am hitting
a jam. It is a light weight OLTP test. The param
settings are below.
Any suggestions for experiments would be appreciated! I like MaxDB....:-)
1. Can MAXCPU be higher then the number of physical CPUs?
2. Are the Warnings showing something that I need to change some parameter?
The only parameter that I have changed is MAXCPU, from 7 to 8. The system is an 8 core sparc. I have gotten good results up to a point but I am now bottlnecked. The
Vmstat output shows User/System at 75%/25%. Its Flat out.
The I/O is only the LOG volume -
IOSTAT:
us sy wt id
74 26 0 0
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 248.2 0.0 1985.6 0.0 1.0 0.0 3.9 0 96 c3t0d0
75% of the cpus are due to MaxDB - So I ran dbanalyzer. Can anyone comment on the W messages or anything else that might be of interest.
I Hardware: Number of CPU's 8, phys. memory 32768 MB, virt. memory 8004 MB
CON: NUM_PHYSICAL_CPU > 1
VAL: 8 > 1
I Runtime version: X64/SUN 7.5.0 Build 026-123-094-430
CON: 1
VAL: 1
I Instance IGEN (tpc490) is up since 2005-08-06 08:36:58
CON: 1
VAL: 1
I Configuration: number of CPUs (MAXCPU): 8, max user tasks: 3500
CON: 1
VAL: 1
I Number of data volumes: 2
CON: 1
VAL: 1
I SQL commands executed: 157424444
CON: SQL_Cmds > 0
VAL: 157424444 > 0
W1 Table DBA.CUSTOMER_125 contains 1250000 rows (36765 pages), sample rows: 20000
CON: FEW_SAMPLE_ROWS_ROW_COUNT["CUSTOMER_125"] > 1000000
VAL: 1250000 > 1000000
W1 Table DBA.ORDER_125 contains 12500000 rows (96900 pages), sample rows: 20000
CON: FEW_SAMPLE_ROWS_ROW_COUNT["ORDER_125"] > 1000000
VAL: 12500000 > 1000000
===== #1 at 2005-08-08 10:18:35
I SQL commands executed: 1569550
CON: PureSQL_Cmds > INTERVAL * 5
VAL: 1569550 > 126 * 5
I LOGQUE1: collision rate 6.02%, 28809 collisions, 175 waits (0.04%), 478525 accesses on region 23
CON: REGION_COLLISION_PERCENT[""] > ( 1 + MAXCPU / 3 )
VAL: 6.02 > ( 1 + 8 / 3 )
W1 Number of runnable user tasks: 240
CON: RunnableUserTasks > MAXCPU
VAL: 240 > 8
W2 System idle time 11.20%, CPU used from instance IGEN: 81.08 %
CON: HostIdleTimePercent >= 10.00
VAL: 11.20 >= 10.00
Here are the parameter settings:
OK
KERNELVERSION KERNEL 7.5.0 BUILD 026-123-094-430
INSTANCE_TYPE OLTP
MCOD NO
SERVERDBFOR_SAP YES
_UNICODE NO
DEFAULT_CODE ASCII
DATE_TIME_FORMAT INTERNAL
CONTROLUSERID SDB
CONTROLPASSWORD
MAXLOGVOLUMES 3
MAXDATAVOLUMES 5
LOG_VOLUME_NAME_002 /var/opt/sdb/data/igen/log/DISKL0002
LOG_VOLUME_NAME_001 /var/opt/sdb/data/igen/log/DISKL0001
LOG_VOLUME_TYPE_002 R
LOG_VOLUME_TYPE_001 R
LOG_VOLUME_SIZE_002 320000
LOG_VOLUME_SIZE_001 320000
DATA_VOLUME_NAME_0002 /var/opt/sdb/data/igen/data/DISKD0002
DATA_VOLUME_NAME_0001 /var/opt/sdb/data/igen/data/DISKD0001
DATA_VOLUME_TYPE_0002 R
DATA_VOLUME_TYPE_0001 R
DATA_VOLUME_SIZE_0002 888281
DATA_VOLUME_SIZE_0001 888281
DATA_VOLUME_MODE_0002 NORMAL
DATA_VOLUME_MODE_0001 NORMAL
DATA_VOLUME_GROUPS 1
LOG_BACKUP_TO_PIPE NO
MAXBACKUPDEVS 2
BACKUP_BLOCK_CNT 8
LOG_MIRRORED NO
MAXVOLUMES 9
MULTIO_BLOCK_CNT 8
DELAYLOGWRITER 0
LOG_IO_QUEUE 50
RESTARTTIME 600
MAXCPU 8
MAXUSERTASKS 3500
TRANSRGNS 8
TABRGNS 8
OMSREGIONS 0
OMSRGNS 25
OMS_HEAP_LIMIT 0
OMS_HEAP_COUNT 8
OMS_HEAP_BLOCKSIZE 10000
OMS_HEAP_THRESHOLD 100
OMS_VERS_THRESHOLD 2097152
HEAP_CHECK_LEVEL 0
ROWRGNS 8
MINSERVER_DESC 10
MAXSERVERTASKS 50
_MAXTRANS 14208
MAXLOCKS 142080
LOCKSUPPLY_BLOCK 100
DEADLOCK_DETECTION 4
SESSION_TIMEOUT 900
OMS_STREAM_TIMEOUT 30
REQUEST_TIMEOUT 5000
IOPROCSPER_DEV 2
IOPROCSFOR_PRIO 0
USEIOPROCS_ONLY NO
IOPROCSSWITCH 2
LRU_FOR_SCAN NO
PAGESIZE 8192
PACKETSIZE 36864
MINREPLYSIZE 4096
MBLOCKDATA_SIZE 32768
MBLOCKQUAL_SIZE 16384
MBLOCKSTACK_SIZE 16384
MBLOCKSTRAT_SIZE 8192
WORKSTACKSIZE 8192
WORKDATASIZE 8192
CATCACHE_MINSIZE 262144
CAT_CACHE_SUPPLY 112032
INIT_ALLOCATORSIZE 221184
ALLOW_MULTIPLE_SERVERTASK_UKTS NO
TASKCLUSTER01 tw;al;ut;2000sv,100bup;10ev,10gc;
TASKCLUSTER02 ti,100dw;438us;
TASKCLUSTER03 equalize
DYNTASK_STACK NO
MPRGN_QUEUE YES
MPRGN_DIRTY_READ YES
MPRGN_BUSY_WAIT YES
MPDISP_LOOPS 2
MPDISP_PRIO YES
XP_MP_RGN_LOOP 0
MP_RGN_LOOP 100
MPRGN_PRIO YES
MAXRGN_REQUEST 3000
PRIOBASE_U2U 100
PRIOBASE_IOC 80
PRIOBASE_RAV 80
PRIOBASE_REX 40
PRIOBASE_COM 10
PRIOFACTOR 80
DELAYCOMMIT NO
SVP1_CONV_FLUSH NO
MAXGARBAGECOLL 0
MAXTASKSTACK 400
MAX_SERVERTASK_STACK 100
MAX_SPECIALTASK_STACK 100
DWIO_AREA_SIZE 50
DWIO_AREA_FLUSH 50
FBM_VOLUME_COMPRESSION 50
FBM_VOLUME_BALANCE 10
FBMLOW_IO_RATE 10
CACHE_SIZE 400144
DWLRU_TAIL_FLUSH 25
XP_DATA_CACHE_RGNS 0
DATACACHE_RGNS 64
XP_CONVERTER_REGIONS 0
CONVERTER_REGIONS 8
XP_MAXPAGER 0
MAXPAGER 64
SEQUENCE_CACHE 1
IDXFILELIST_SIZE 2048
SERVERDESC_CACHE 3553
SERVERCMD_CACHE 51
VOLUMENO_BIT_COUNT 8
OPTIM_MAX_MERGE 500
OPTIM_INV_ONLY YES
OPTIM_CACHE NO
OPTIM_JOIN_FETCH 0
JOIN_SEARCH_LEVEL 0
JOIN_MAXTAB_LEVEL4 16
JOIN_MAXTAB_LEVEL9 5
READAHEADBLOBS 25
RUNDIRECTORY /var/opt/sdb/data/wrk/IGEN
OPMSG1 /dev/console
OPMSG2 /dev/null
_KERNELDIAGFILE knldiag
KERNELDIAGSIZE 800
_EVENTFILE knldiag.evt
_EVENTSIZE 0
_MAXEVENTTASKS 1
_MAXEVENTS 100
_KERNELTRACEFILE knltrace
TRACE_PAGES_TI 2
TRACE_PAGES_GC 0
TRACE_PAGES_LW 5
TRACE_PAGES_PG 3
TRACE_PAGES_US 10
TRACE_PAGES_UT 5
TRACE_PAGES_SV 5
TRACE_PAGES_EV 2
TRACE_PAGES_BUP 0
KERNELTRACESIZE 35457
EXTERNAL_DUMP_REQUEST NO
AKDUMP_ALLOWED YES
_KERNELDUMPFILE knldump
_RTEDUMPFILE rtedump
UTILITYPROTFILE dbm.utl
UTILITY_PROTSIZE 100
BACKUPHISTFILE dbm.knl
BACKUPMED_DEF dbm.mdf
MAXMESSAGE_FILES 0
EVENTALIVE_CYCLE 0
_SHAREDDYNDATA 400381
_SHAREDDYNPOOL 134012
_SHMKERNEL 3630122
__PARAM_CHANGED___ 0
__PARAM_VERIFIED__ 2005-08-06 08:36:58
DIAG_HISTORY_NUM 2
DIAG_HISTORY_PATH /var/opt/sdb/data/wrk/IGEN/DIAGHISTORY
DIAGSEM 1
SHOW_MAX_STACK_USE NO
LOG_SEGMENT_SIZE 106666
SUPPRESS_CORE YES
FORMATTING_MODE PARALLEL
FORMAT_DATAVOLUME YES
LOAD_BALANCING_CHK 0
LOAD_BALANCING_DIF 10
LOAD_BALANCING_EQ 5
HS_STORAGE_DLL libhsscopy
HS_SYNC_INTERVAL 50
USE_OPEN_DIRECT NO
SYMBOL_DEMANGLING NO
EXPAND_COM_TRACE NO
OPTIMIZE_OPERATOR_JOIN_COSTFUNC YES
OPTIMIZE_JOIN_PARALLEL_SERVERS 0
OPTIMIZE_JOIN_OPERATOR_SORT YES
OPTIMIZE_JOIN_OUTER YES
JOIN_OPERATOR_IMPLEMENTATION YES
JOIN_TABLEBUFFER 128
OPTIMIZE_FETCH_REVERSE YES
SET_VOLUME_LOCK YES
SHAREDSQL NO
SHAREDSQL_EXPECTEDSTATEMENTCOUNT 1500
SHAREDSQL_COMMANDCACHESIZE 32768
MEMORY_ALLOCATION_LIMIT 0
USE_SYSTEM_PAGE_CACHE YES
USE_COROUTINES YES
USE_STACK_ON_STACK NO
USE_UCONTEXT YES
MIN_RETENTION_TIME 60
MAX_RETENTION_TIME 480
MAX_SINGLE_HASHTABLE_SIZE 512
MAX_HASHTABLE_MEMORY 5120
HASHED_RESULTSET NO
HASHED_RESULTSET_CACHESIZE 262144
AUTO_RECREATE_BAD_INDEXES NO
LOCAL_REDO_LOG_BUFFER_SIZE 0
FORBID_LOAD_BALANCING NO
SIMULATE_VECTORIO NEVER
You have to design in answers!
In RESULT you can configer:
Enable column sorting in Dashboards = true/false
Regards,
Stefan Hess
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