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Surface avg I/O size (KB) per file in sp_PressureDetector #773

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Merged
erikdarlingdata merged 1 commit into from
Apr 29, 2026
Merged

Surface avg I/O size (KB) per file in sp_PressureDetector #773

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86 changes: 86 additions & 0 deletions sp_PressureDetector/sp_PressureDetector.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -630,10 +630,14 @@ OPTION(MAXDOP 1, RECOMPILE);',
total_mb_read decimal(38,2) NULL,
total_read_count bigint NULL,
avg_read_stall_ms decimal(38,2) NULL,
avg_read_kb decimal(38,2) NULL,
total_gb_written decimal(38,2) NULL,
total_mb_written decimal(38,2) NULL,
total_write_count bigint NULL,
avg_write_stall_ms decimal(38,2) NULL,
avg_write_kb decimal(38,2) NULL,
num_of_bytes_read bigint NULL,
num_of_bytes_written bigint NULL,
io_stall_read_ms bigint NULL,
io_stall_write_ms bigint NULL,
PRIMARY KEY CLUSTERED (collection_time, id)
Expand Down Expand Up @@ -1052,10 +1056,14 @@ OPTION(MAXDOP 1, RECOMPILE);',
total_mb_read decimal(38,2),
total_read_count bigint,
avg_read_stall_ms decimal(38,2),
avg_read_kb decimal(38,2),
total_gb_written decimal(38,2),
total_mb_written decimal(38,2),
total_write_count bigint,
avg_write_stall_ms decimal(38,2),
avg_write_kb decimal(38,2),
num_of_bytes_read bigint,
num_of_bytes_written bigint,
io_stall_read_ms bigint,
io_stall_write_ms bigint,
sample_time datetime
Expand Down Expand Up @@ -1698,6 +1706,21 @@ OPTION(MAXDOP 1, RECOMPILE);',
0.
)
),
avg_read_kb =
CONVERT
(
decimal(38, 2),
ISNULL
(
(vfs.num_of_bytes_read / 1024.) /
CONVERT
(
decimal(38, 2),
NULLIF(vfs.num_of_reads, 0.)
),
0.
)
),
total_gb_written =
CASE
WHEN vfs.num_of_bytes_written > 0
Expand Down Expand Up @@ -1735,6 +1758,25 @@ OPTION(MAXDOP 1, RECOMPILE);',
0.
)
),
avg_write_kb =
CONVERT
(
decimal(38, 2),
ISNULL
(
(vfs.num_of_bytes_written / 1024.) /
CONVERT
(
decimal(38, 2),
NULLIF(vfs.num_of_writes, 0.)
),
0.
)
),
num_of_bytes_read =
vfs.num_of_bytes_read,
num_of_bytes_written =
vfs.num_of_bytes_written,
io_stall_read_ms,
io_stall_write_ms,
sample_time =
Expand Down Expand Up @@ -1790,10 +1832,14 @@ OPTION(MAXDOP 1, RECOMPILE);',
total_mb_read,
total_read_count,
avg_read_stall_ms,
avg_read_kb,
total_gb_written,
total_mb_written,
total_write_count,
avg_write_stall_ms,
avg_write_kb,
num_of_bytes_read,
num_of_bytes_written,
io_stall_read_ms,
io_stall_write_ms,
sample_time
Expand All @@ -1816,6 +1862,8 @@ OPTION(MAXDOP 1, RECOMPILE);',
fm.file_size_gb,
fm.avg_read_stall_ms,
fm.avg_write_stall_ms,
fm.avg_read_kb,
fm.avg_write_kb,
fm.total_gb_read,
fm.total_gb_written,
total_read_count =
Expand All @@ -1838,6 +1886,8 @@ OPTION(MAXDOP 1, RECOMPILE);',
fm.avg_read_stall_ms,
fm.avg_write_stall_ms,
fm.total_avg_stall_ms,
fm.avg_read_kb,
fm.avg_write_kb,
fm.total_gb_read,
fm.total_gb_written,
fm.total_read_count,
Expand All @@ -1855,6 +1905,8 @@ OPTION(MAXDOP 1, RECOMPILE);',
avg_read_stall_ms = 0,
avg_write_stall_ms = 0,
total_avg_stall_ms = 0,
avg_read_kb = 0,
avg_write_kb = 0,
total_gb_read = 0,
total_gb_written = 0,
total_read_count = N'0',
Expand Down Expand Up @@ -1927,6 +1979,30 @@ OPTION(MAXDOP 1, RECOMPILE);',
)
)
END,
avg_read_kb =
CASE
WHEN (fm2.total_read_count - fm.total_read_count) = 0
THEN 0.00
ELSE
CONVERT
(
decimal(38, 2),
((fm2.num_of_bytes_read - fm.num_of_bytes_read) / 1024.) /
(fm2.total_read_count - fm.total_read_count)
)
END,
avg_write_kb =
CASE
WHEN (fm2.total_write_count - fm.total_write_count) = 0
THEN 0.00
ELSE
CONVERT
(
decimal(38, 2),
((fm2.num_of_bytes_written - fm.num_of_bytes_written) / 1024.) /
(fm2.total_write_count - fm.total_write_count)
)
END,
total_mb_read =
(fm2.total_mb_read - fm.total_mb_read),
total_mb_written =
Expand Down Expand Up @@ -1954,6 +2030,8 @@ OPTION(MAXDOP 1, RECOMPILE);',
f.avg_read_stall_ms,
f.avg_write_stall_ms,
f.total_avg_stall,
f.avg_read_kb,
f.avg_write_kb,
total_mb_read =
FORMAT(f.total_mb_read, 'N0'),
total_mb_written =
Expand Down Expand Up @@ -2003,10 +2081,14 @@ OPTION(MAXDOP 1, RECOMPILE);',
total_mb_read,
total_read_count,
avg_read_stall_ms,
avg_read_kb,
total_gb_written,
total_mb_written,
total_write_count,
avg_write_stall_ms,
avg_write_kb,
num_of_bytes_read,
num_of_bytes_written,
io_stall_read_ms,
io_stall_write_ms
)
Expand All @@ -2020,10 +2102,14 @@ OPTION(MAXDOP 1, RECOMPILE);',
fm.total_mb_read,
fm.total_read_count,
fm.avg_read_stall_ms,
fm.avg_read_kb,
fm.total_gb_written,
fm.total_mb_written,
fm.total_write_count,
fm.avg_write_stall_ms,
fm.avg_write_kb,
fm.num_of_bytes_read,
fm.num_of_bytes_written,
fm.io_stall_read_ms,
fm.io_stall_write_ms
FROM #file_metrics AS fm;
Expand Down
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