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crl-release-23.2: db: more readable iterator stats
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This change reformats the output of iterator stats which are very hard
to read. We omit reverse counts when they are zero and remove
redundant information.

We also show the cached and not-cached block bytes instead of the
total and cached.
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@RaduBerinde
RaduBerinde committed Jun 11, 2024
1 parent a3d91f3 commit 4273469
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Showing 9 changed files with 283 additions and 412 deletions.
35 changes: 35 additions & 0 deletions internal/base/iterator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,9 @@ package base
import (
"fmt"
"time"

"github.com/cockroachdb/pebble/internal/humanize"
"github.com/cockroachdb/redact"
)

// InternalIterator iterates over a DB's key/value pairs in key order. Unlike
Expand Down Expand Up @@ -407,3 +410,35 @@ func (s *InternalIteratorStats) Merge(from InternalIteratorStats) {
s.SeparatedPointValue.ValueBytes += from.SeparatedPointValue.ValueBytes
s.SeparatedPointValue.ValueBytesFetched += from.SeparatedPointValue.ValueBytesFetched
}

func (s *InternalIteratorStats) String() string {
return redact.StringWithoutMarkers(s)
}

// SafeFormat implements the redact.SafeFormatter interface.
func (s *InternalIteratorStats) SafeFormat(p redact.SafePrinter, verb rune) {
p.Printf("blocks: %s cached",
humanize.Bytes.Uint64(s.BlockBytesInCache),
)
if s.BlockBytes != s.BlockBytesInCache || s.BlockReadDuration != 0 {
p.Printf(", %s not cached (read time: %s)",
humanize.Bytes.Uint64(s.BlockBytes-s.BlockBytesInCache),
humanize.FormattedString(s.BlockReadDuration.String()),
)
}
p.Printf("; points: %s", humanize.Count.Uint64(s.PointCount))

if s.PointsCoveredByRangeTombstones != 0 {
p.Printf("(%s tombstoned)", humanize.Count.Uint64(s.PointsCoveredByRangeTombstones))
}
p.Printf(" (%s keys, %s values)",
humanize.Bytes.Uint64(s.KeyBytes),
humanize.Bytes.Uint64(s.ValueBytes),
)
if s.SeparatedPointValue.Count != 0 {
p.Printf("; separated: %s (%s, %s fetched)",
humanize.Count.Uint64(s.SeparatedPointValue.Count),
humanize.Bytes.Uint64(s.SeparatedPointValue.ValueBytes),
humanize.Bytes.Uint64(s.SeparatedPointValue.ValueBytesFetched))
}
}
80 changes: 46 additions & 34 deletions iterator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -154,6 +154,18 @@ func (s *RangeKeyIteratorStats) Merge(o RangeKeyIteratorStats) {
s.SkippedPoints += o.SkippedPoints
}

func (s *RangeKeyIteratorStats) String() string {
return redact.StringWithoutMarkers(s)
}

// SafeFormat implements the redact.SafeFormatter interface.
func (s *RangeKeyIteratorStats) SafeFormat(p redact.SafePrinter, verb rune) {
p.Printf("range keys: %s, contained points: %s (%s skipped)",
humanize.Count.Uint64(uint64(s.Count)),
humanize.Count.Uint64(uint64(s.ContainedPoints)),
humanize.Count.Uint64(uint64(s.SkippedPoints)))
}

// LazyValue is a lazy value. See the long comment in base.LazyValue.
type LazyValue = base.LazyValue

Expand Down Expand Up @@ -2788,44 +2800,44 @@ func (stats *IteratorStats) String() string {

// SafeFormat implements the redact.SafeFormatter interface.
func (stats *IteratorStats) SafeFormat(s redact.SafePrinter, verb rune) {
for i := range stats.ForwardStepCount {
switch IteratorStatsKind(i) {
case InterfaceCall:
s.SafeString("(interface (dir, seek, step): ")
case InternalIterCall:
s.SafeString(", (internal (dir, seek, step): ")
}
s.Printf("(fwd, %d, %d), (rev, %d, %d))",
redact.Safe(stats.ForwardSeekCount[i]), redact.Safe(stats.ForwardStepCount[i]),
redact.Safe(stats.ReverseSeekCount[i]), redact.Safe(stats.ReverseStepCount[i]))
if stats.ReverseSeekCount[InterfaceCall] == 0 && stats.ReverseSeekCount[InternalIterCall] == 0 {
s.Printf("seeked %s times (%s internal)",
humanize.Count.Uint64(uint64(stats.ForwardSeekCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardSeekCount[InternalIterCall])),
)
} else {
s.Printf("seeked %s times (%s fwd/%s rev, internal: %s fwd/%s rev)",
humanize.Count.Uint64(uint64(stats.ForwardSeekCount[InterfaceCall]+stats.ReverseSeekCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardSeekCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ReverseSeekCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardSeekCount[InternalIterCall])),
humanize.Count.Uint64(uint64(stats.ReverseSeekCount[InternalIterCall])),
)
}
if stats.InternalStats != (InternalIteratorStats{}) {
s.SafeString(",\n(internal-stats: ")
s.Printf("(block-bytes: (total %s, cached %s, read-time %s)), "+
"(points: (count %s, key-bytes %s, value-bytes %s, tombstoned %s))",
humanize.Bytes.Uint64(stats.InternalStats.BlockBytes),
humanize.Bytes.Uint64(stats.InternalStats.BlockBytesInCache),
humanize.FormattedString(stats.InternalStats.BlockReadDuration.String()),
humanize.Count.Uint64(stats.InternalStats.PointCount),
humanize.Bytes.Uint64(stats.InternalStats.KeyBytes),
humanize.Bytes.Uint64(stats.InternalStats.ValueBytes),
humanize.Count.Uint64(stats.InternalStats.PointsCoveredByRangeTombstones),
s.SafeString("; ")

if stats.ReverseStepCount[InterfaceCall] == 0 && stats.ReverseStepCount[InternalIterCall] == 0 {
s.Printf("stepped %s times (%s internal)",
humanize.Count.Uint64(uint64(stats.ForwardStepCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardStepCount[InternalIterCall])),
)
if stats.InternalStats.SeparatedPointValue.Count != 0 {
s.Printf(", (separated: (count %s, bytes %s, fetched %s)))",
humanize.Count.Uint64(stats.InternalStats.SeparatedPointValue.Count),
humanize.Bytes.Uint64(stats.InternalStats.SeparatedPointValue.ValueBytes),
humanize.Bytes.Uint64(stats.InternalStats.SeparatedPointValue.ValueBytesFetched))
} else {
s.Printf(")")
}
} else {
s.Printf("stepped %s times (%s fwd/%s rev, internal: %s fwd/%s rev)",
humanize.Count.Uint64(uint64(stats.ForwardStepCount[InterfaceCall]+stats.ReverseStepCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardStepCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ReverseStepCount[InterfaceCall])),
humanize.Count.Uint64(uint64(stats.ForwardStepCount[InternalIterCall])),
humanize.Count.Uint64(uint64(stats.ReverseStepCount[InternalIterCall])),
)
}

if stats.InternalStats != (InternalIteratorStats{}) {
s.SafeString("; ")
stats.InternalStats.SafeFormat(s, verb)
}
if stats.RangeKeyStats != (RangeKeyIteratorStats{}) {
s.SafeString(",\n(range-key-stats: ")
s.Printf("(count %d), (contained points: (count %d, skipped %d)))",
stats.RangeKeyStats.Count,
stats.RangeKeyStats.ContainedPoints,
stats.RangeKeyStats.SkippedPoints)
s.SafeString(", ")
stats.RangeKeyStats.SafeFormat(s, verb)
}
}

Expand Down
6 changes: 2 additions & 4 deletions testdata/external_iterator
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Original file line number Diff line number Diff line change
Expand Up @@ -253,8 +253,7 @@ aaaa@3: (aaaa@3, .)
aaaa@1: (aaaa@1, .)
aaaaa@3: (aaaaa@3, .)
aaaaa@1: (aaaaa@1, .)
stats: (interface (dir, seek, step): (fwd, 5, 5), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 5, 5), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 475B, cached 0B, read-time 0s)), (points: (count 10, key-bytes 50B, value-bytes 50B, tombstoned 0)))
stats: seeked 5 times (5 internal); stepped 5 times (5 internal); blocks: 0B cached, 475B not cached (read time: 0s); points: 10 (50B keys, 50B values)

# Note the inclusion of fwd-only. This iterator will use the TrySeekUsingNext
# optimization and loads ~half the block-bytes as a result.
Expand Down Expand Up @@ -282,5 +281,4 @@ aaaa@3: (aaaa@3, .)
aaaa@1: (aaaa@1, .)
aaaaa@3: (aaaaa@3, .)
aaaaa@1: (aaaaa@1, .)
stats: (interface (dir, seek, step): (fwd, 5, 5), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 5, 5), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 281B, cached 0B, read-time 0s)), (points: (count 10, key-bytes 50B, value-bytes 50B, tombstoned 0)))
stats: seeked 5 times (5 internal); stepped 5 times (5 internal); blocks: 0B cached, 281B not cached (read time: 0s); points: 10 (50B keys, 50B values)
12 changes: 4 additions & 8 deletions testdata/iter_histories/iter_optimizations
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Original file line number Diff line number Diff line change
Expand Up @@ -199,8 +199,7 @@ stats
----
lastPositioningOp="unknown"
b@5: (b@5, .)
stats: (interface (dir, seek, step): (fwd, 1, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 0), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 119B, cached 0B, read-time 0s)), (points: (count 1, key-bytes 3B, value-bytes 3B, tombstoned 0)))
stats: seeked 1 times (1 internal); stepped 0 times (0 internal); blocks: 0B cached, 119B not cached (read time: 0s); points: 1 (3B keys, 3B values)

mutate batch=foo
set h@2 h@2
Expand All @@ -215,8 +214,7 @@ stats
.
lastPositioningOp="seekprefixge"
c@3: (c@3, .)
stats: (interface (dir, seek, step): (fwd, 2, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 2, 0), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 119B, cached 0B, read-time 0s)), (points: (count 2, key-bytes 6B, value-bytes 6B, tombstoned 0)))
stats: seeked 2 times (2 internal); stepped 0 times (0 internal); blocks: 0B cached, 119B not cached (read time: 0s); points: 2 (6B keys, 6B values)

mutate batch=foo
set i@1 i@1
Expand All @@ -231,8 +229,7 @@ stats
.
lastPositioningOp="seekprefixge"
d@9: (d@9, .)
stats: (interface (dir, seek, step): (fwd, 3, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 3, 0), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 119B, cached 0B, read-time 0s)), (points: (count 3, key-bytes 9B, value-bytes 9B, tombstoned 0)))
stats: seeked 3 times (3 internal); stepped 0 times (0 internal); blocks: 0B cached, 119B not cached (read time: 0s); points: 3 (9B keys, 9B values)

mutate batch=foo
set j@6 j@6
Expand All @@ -247,8 +244,7 @@ stats
.
lastPositioningOp="seekprefixge"
e@8: (e@8, .)
stats: (interface (dir, seek, step): (fwd, 4, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 4, 0), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 119B, cached 0B, read-time 0s)), (points: (count 4, key-bytes 12B, value-bytes 12B, tombstoned 0)))
stats: seeked 4 times (4 internal); stepped 0 times (0 internal); blocks: 0B cached, 119B not cached (read time: 0s); points: 4 (12B keys, 12B values)

# Ensure that a case eligible for TrySeekUsingNext across a SetOptions correctly
# sees new batch mutations. The batch iterator should ignore the
Expand Down
32 changes: 8 additions & 24 deletions testdata/iter_histories/range_key_masking
View file
Original file line number Diff line number Diff line change
Expand Up @@ -153,9 +153,7 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 1.1KB, cached 0B, read-time 0s)), (points: (count 25, key-bytes 75B, value-bytes 75B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 25, skipped 25)))
stats: seeked 1 times (1 internal); stepped 1 times (1 internal); blocks: 0B cached, 1.1KB not cached (read time: 0s); points: 25 (75B keys, 75B values), range keys: 1, contained points: 25 (25 skipped)

# Repeat the above test, but with an iterator that uses a block-property filter
# mask. The internal stats should reflect fewer bytes read and fewer points
Expand All @@ -168,9 +166,7 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 514B, cached 514B, read-time 0s)), (points: (count 2, key-bytes 6B, value-bytes 6B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 2, skipped 2)))
stats: seeked 1 times (1 internal); stepped 1 times (1 internal); blocks: 514B cached; points: 2 (6B keys, 6B values), range keys: 1, contained points: 2 (2 skipped)

# Perform a similar comparison in reverse.

Expand All @@ -181,9 +177,7 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)),
(internal-stats: (block-bytes: (total 1.1KB, cached 1.1KB, read-time 0s)), (points: (count 25, key-bytes 75B, value-bytes 75B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 25, skipped 25)))
stats: seeked 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); stepped 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); blocks: 1.1KB cached; points: 25 (75B keys, 75B values), range keys: 1, contained points: 25 (25 skipped)

combined-iter mask-suffix=@9 mask-filter
last
Expand All @@ -192,9 +186,7 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)),
(internal-stats: (block-bytes: (total 514B, cached 514B, read-time 0s)), (points: (count 2, key-bytes 6B, value-bytes 6B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 2, skipped 2)))
stats: seeked 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); stepped 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); blocks: 514B cached; points: 2 (6B keys, 6B values), range keys: 1, contained points: 2 (2 skipped)

# Perform similar comparisons with seeks.

Expand All @@ -205,9 +197,7 @@ stats
----
m: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 789B, cached 789B, read-time 0s)), (points: (count 13, key-bytes 39B, value-bytes 39B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 13, skipped 13)))
stats: seeked 1 times (1 internal); stepped 1 times (1 internal); blocks: 789B cached; points: 13 (39B keys, 39B values), range keys: 1, contained points: 13 (13 skipped)

combined-iter mask-suffix=@9 mask-filter
seek-ge m
Expand All @@ -216,9 +206,7 @@ stats
----
m: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 514B, cached 514B, read-time 0s)), (points: (count 2, key-bytes 6B, value-bytes 6B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 2, skipped 2)))
stats: seeked 1 times (1 internal); stepped 1 times (1 internal); blocks: 514B cached; points: 2 (6B keys, 6B values), range keys: 1, contained points: 2 (2 skipped)

combined-iter mask-suffix=@9
seek-lt m
Expand All @@ -227,9 +215,7 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)),
(internal-stats: (block-bytes: (total 789B, cached 789B, read-time 0s)), (points: (count 12, key-bytes 36B, value-bytes 36B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 12, skipped 12)))
stats: seeked 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); stepped 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); blocks: 789B cached; points: 12 (36B keys, 36B values), range keys: 1, contained points: 12 (12 skipped)

combined-iter mask-suffix=@9 mask-filter
seek-lt m
Expand All @@ -238,6 +224,4 @@ stats
----
a: (., [a-z) @5=boop UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 1, 1)),
(internal-stats: (block-bytes: (total 539B, cached 539B, read-time 0s)), (points: (count 2, key-bytes 6B, value-bytes 6B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 2, skipped 2)))
stats: seeked 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); stepped 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); blocks: 539B cached; points: 2 (6B keys, 6B values), range keys: 1, contained points: 2 (2 skipped)
29 changes: 8 additions & 21 deletions testdata/iter_histories/stats_no_invariants
View file
Original file line number Diff line number Diff line change
Expand Up @@ -30,19 +30,15 @@ next
next
stats
----
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 0, 0))
stats: seeked 0 times (0 internal); stepped 0 times (0 internal)
a: (a, .)
b: (b, [b-c) @5=boop UPDATED)
stats: (interface (dir, seek, step): (fwd, 1, 1), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 2), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 89B, cached 0B, read-time 0s)), (points: (count 2, key-bytes 2B, value-bytes 2B, tombstoned 0))),
(range-key-stats: (count 1), (contained points: (count 1, skipped 0)))
stats: seeked 1 times (1 internal); stepped 1 times (2 internal); blocks: 0B cached, 89B not cached (read time: 0s); points: 2 (2B keys, 2B values), range keys: 1, contained points: 1 (0 skipped)
c: (c, . UPDATED)
cat: (., [cat-dog) @3=beep UPDATED)
d: (d, [cat-dog) @3=beep)
.
stats: (interface (dir, seek, step): (fwd, 1, 5), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 6), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 89B, cached 0B, read-time 0s)), (points: (count 4, key-bytes 4B, value-bytes 4B, tombstoned 0))),
(range-key-stats: (count 2), (contained points: (count 2, skipped 0)))
stats: seeked 1 times (1 internal); stepped 5 times (6 internal); blocks: 0B cached, 89B not cached (read time: 0s); points: 4 (4B keys, 4B values), range keys: 2, contained points: 2 (0 skipped)

# Do the above forward iteration but with a mask suffix. The results should be
# identical despite range keys serving as masks, because none of the point keys
Expand All @@ -63,9 +59,7 @@ c: (c, . UPDATED)
cat: (., [cat-dog) @3=beep UPDATED)
d: (d, [cat-dog) @3=beep)
.
stats: (interface (dir, seek, step): (fwd, 1, 5), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 1, 6), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 89B, cached 89B, read-time 0s)), (points: (count 4, key-bytes 4B, value-bytes 4B, tombstoned 0))),
(range-key-stats: (count 2), (contained points: (count 2, skipped 0)))
stats: seeked 1 times (1 internal); stepped 5 times (6 internal); blocks: 89B cached; points: 4 (4B keys, 4B values), range keys: 2, contained points: 2 (0 skipped)

# Scan backward

Expand All @@ -84,9 +78,7 @@ c: (c, . UPDATED)
b: (b, [b-c) @5=boop UPDATED)
a: (a, . UPDATED)
.
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 1, 5)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 1, 6)),
(internal-stats: (block-bytes: (total 89B, cached 89B, read-time 0s)), (points: (count 4, key-bytes 4B, value-bytes 4B, tombstoned 0))),
(range-key-stats: (count 2), (contained points: (count 2, skipped 0)))
stats: seeked 1 times (0 fwd/1 rev, internal: 0 fwd/1 rev); stepped 5 times (0 fwd/5 rev, internal: 0 fwd/6 rev); blocks: 89B cached; points: 4 (4B keys, 4B values), range keys: 2, contained points: 2 (0 skipped)

combined-iter
seek-ge ace
Expand All @@ -107,9 +99,7 @@ cat: (., [cat-dog) @3=beep)
d: (d, [cat-dog) @3=beep)
day: (., [cat-dog) @3=beep)
.
stats: (interface (dir, seek, step): (fwd, 8, 0), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 6, 4), (rev, 0, 0)),
(internal-stats: (block-bytes: (total 89B, cached 89B, read-time 0s)), (points: (count 4, key-bytes 4B, value-bytes 4B, tombstoned 0))),
(range-key-stats: (count 2), (contained points: (count 3, skipped 0)))
stats: seeked 8 times (6 internal); stepped 0 times (4 internal); blocks: 89B cached; points: 4 (4B keys, 4B values), range keys: 2, contained points: 3 (0 skipped)

combined-iter
seek-lt 1
Expand All @@ -134,9 +124,7 @@ cat: (., [cat-dog) @3=beep UPDATED)
d: (d, [cat-dog) @3=beep)
d: (d, [cat-dog) @3=beep)
d: (d, [cat-dog) @3=beep)
stats: (interface (dir, seek, step): (fwd, 0, 0), (rev, 10, 0)), (internal (dir, seek, step): (fwd, 0, 0), (rev, 10, 10)),
(internal-stats: (block-bytes: (total 267B, cached 267B, read-time 0s)), (points: (count 15, key-bytes 15B, value-bytes 15B, tombstoned 0))),
(range-key-stats: (count 2), (contained points: (count 6, skipped 0)))
stats: seeked 10 times (0 fwd/10 rev, internal: 0 fwd/10 rev); stepped 0 times (0 fwd/0 rev, internal: 0 fwd/10 rev); blocks: 267B cached; points: 15 (15B keys, 15B values), range keys: 2, contained points: 6 (0 skipped)

rangekey-iter
first
Expand All @@ -155,5 +143,4 @@ cat [cat-dog) @3=beep UPDATED
bat [bat-c) @5=boop UPDATED
cat [cat-catatonic) @3=beep UPDATED
.
stats: (interface (dir, seek, step): (fwd, 2, 4), (rev, 0, 0)), (internal (dir, seek, step): (fwd, 2, 4), (rev, 0, 0)),
(range-key-stats: (count 4), (contained points: (count 0, skipped 0)))
stats: seeked 2 times (2 internal); stepped 4 times (4 internal), range keys: 4, contained points: 0 (0 skipped)
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