storage: re-use buffer across calls to sstIterator.SeekGE #58121
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At the end of a 4 hour, 2.2 TB IMPORT of TPC-E, this was responsible for
2.67% of all heap allocations (by object) due to the call to
`sstIterator.SeekGE` from `checkForKeyCollisionsGo`.
```
File: cockroach
Type: alloc_objects
Time: Dec 21, 2020 at 2:51am (UTC)
Duration: 5.32s, Total samples = 6963804
Active filters:
focus=SeekGE
Showing nodes accounting for 212999, 3.06% of 6963804 total
----------------------------------------------------------+-------------
185692 100% | github.com/cockroachdb/cockroach/pkg/storage.checkForKeyCollisionsGo /go/src/github.com/cockroachdb/cockroach/pkg/storage/mvcc.go:3807
0 0% 0% 185692 2.67% | github.com/cockroachdb/cockroach/pkg/storage.(*sstIterator).SeekGE /go/src/github.com/cockroachdb/cockroach/pkg/storage/sst_iterator.go:93
185692 100% | github.com/cockroachdb/cockroach/pkg/storage.EncodeKey /go/src/github.com/cockroachdb/cockroach/pkg/storage/batch.go:126
```
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This change is |
sumeerbhola
approved these changes
Dec 21, 2020
There was a problem hiding this comment.
Reviewed 1 of 1 files at r1.
Reviewable status:complete! 1 of 0 LGTMs obtained
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bors r+ |
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Build succeeded: |
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At the end of a 4 hour, 2.2 TB IMPORT of TPC-E, this was responsible for 2.67% of all heap allocations (by object) due to the call to
sstIterator.SeekGEfromcheckForKeyCollisionsGo.