Performance Tuning with SQL Server Dynamic Management Views

P
Performance counters 277–291
average number of operations completed
289–291
deprecated feature use 282–283
directly usable counter types 280–283
monitor auto-grow/auto-shrink events
281–282
PERF_AVERAGE_BULK 289
PERF_COUNTER_BULK_COUNT 286
PERF_COUNTER_LARGE_RAWCOUNT 280
PERF_LARGE_RAW_FRACTION 283
per second averages 286–289
providing ratios 283–286
Performance Monitor (PerfMon) 29
Performance tuning with DMOs. See Dynamic
Management Object (DMO)
Physical I/O. See Disk
Plan handles 54
return plan using sys.dm_exec_text_query_plan
86–87
Plan reuse 91–98
plan reuse distribution curve 92–95
Point-in-time data 25–27
Profiler 28
Q
Queries
ad hoc query
returning SQL text of 58–61
aggregate query optimization Statistics 111–114
query execution statistics 101–108
323
Query plan attributes 98–101
Query plan metadata 73–114
R
overview of DMOs for, 76–78
READ_COMMITTED_SNAPSHOT mode 150
Read/write ratio 251–259
data read versus written 253–255
Index
number of read and write operations 255–256
number of reads and writes at the table level
256–259
Requests 52–70
Rows
S
investigating work done by 64–66
number of rows in a table 228
number of rows per partition 228–231
scheduler. See CPU usage
server scoped objects 20
Sessions
identify inactive sessions 48–50
idle sessions with orphaned transactions 51–52
session-level settings 45–46
with context switching 48
Single-use plans
examining 97–114
Snapshot isolation. See Transactions
SNAPSHOT mode 150
sp_who, sp_who2 30, 67–70, 120
SQL and plan handles 54
plan handle 84
SQL handle 84