github.com/cockroachdb/pebble@v1.1.2/testdata/iterator_stats (about)

     1  build ext1
     2  merge a 1
     3  set c 2
     4  ----
     5  
     6  ingest ext1
     7  ----
     8  6:
     9    000004:[a#10,MERGE-c#10,SET]
    10  
    11  iter
    12  first
    13  next
    14  next
    15  stats
    16  ----
    17  a: (1, .)
    18  c: (2, .)
    19  .
    20  stats: seeked 1 times (1 internal); stepped 2 times (2 internal); blocks: 57B cached; points: 2 (2B keys, 2B values)
    21  
    22  # Perform the same operation again with a new iterator. It should yield
    23  # identical statistics.
    24  
    25  iter
    26  first
    27  next
    28  next
    29  stats
    30  ----
    31  a: (1, .)
    32  c: (2, .)
    33  .
    34  stats: seeked 1 times (1 internal); stepped 2 times (2 internal); blocks: 57B cached; points: 2 (2B keys, 2B values)
    35  
    36  build ext2
    37  set d@10 d10
    38  set d@9 d9
    39  set d@8 d8
    40  set e@20 e20
    41  set e@18 e18
    42  ----
    43  
    44  ingest ext2
    45  ----
    46  6:
    47    000004:[a#10,MERGE-c#10,SET]
    48    000005:[d@10#11,SET-e@18#11,SET]
    49  
    50  iter
    51  seek-ge c
    52  stats
    53  next
    54  next
    55  stats
    56  next
    57  stats
    58  next
    59  stats
    60  next
    61  stats
    62  ----
    63  c: (2, .)
    64  stats: seeked 1 times (1 internal); stepped 0 times (0 internal); blocks: 57B cached; points: 1 (1B keys, 1B values)
    65  d@10: (d10, .)
    66  d@9: (d9, .)
    67  stats: seeked 1 times (1 internal); stepped 2 times (2 internal); blocks: 147B cached, 10B not cached (read time: 0s); points: 3 (8B keys, 6B values); separated: 1 (2B, 2B fetched)
    68  d@8: (d8, .)
    69  stats: seeked 1 times (1 internal); stepped 3 times (3 internal); blocks: 147B cached, 10B not cached (read time: 0s); points: 4 (11B keys, 8B values); separated: 2 (4B, 4B fetched)
    70  e@20: (e20, .)
    71  stats: seeked 1 times (1 internal); stepped 4 times (4 internal); blocks: 147B cached, 10B not cached (read time: 0s); points: 5 (15B keys, 11B values); separated: 2 (4B, 4B fetched)
    72  e@18: (e18, .)
    73  stats: seeked 1 times (1 internal); stepped 5 times (5 internal); blocks: 147B cached, 10B not cached (read time: 0s); points: 6 (19B keys, 13B values); separated: 3 (7B, 7B fetched)