Like Prometheus, but for logs.

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Christian Haudum b4d0a2cd68 Force using a buffer from the ChunkRefsPool (#9217) ... **What this PR does / why we need it**: Re-using a buffer from the `ChunkRefsPool` avoids unnecessary allocations in TSDB's `GetChunkRefs` call. **Special notes for your reviewer**: Benchmarks ``` $ gotest -v -count=1 ./pkg/storage/stores/tsdb/ -test.run="^$" -test.bench=Bench -test.benchtime=10000x ``` ```console $ benchstat old.txt new.txt name old time/op new time/op delta TenantHeads/10-8 244µs ±58% 55µs ± 4% -77.49% (p=0.000 n=10+9) TenantHeads/100-8 1.75ms ± 9% 0.58ms ±26% -66.89% (p=0.000 n=9+10) TenantHeads/1000-8 16.5ms ± 6% 6.4ms ± 2% -60.89% (p=0.000 n=9+10) IndexClient_Stats-8 25.0µs ±10% 25.1µs ±13% ~ (p=0.863 n=9+9) TSDBIndex_GetChunkRefs-8 3.34ms ±12% 1.46ms ± 2% -56.41% (p=0.000 n=10+9) name old alloc/op new alloc/op delta IndexClient_Stats-8 2.37kB ±12% 2.37kB ±12% ~ (p=0.923 n=10+10) TSDBIndex_GetChunkRefs-8 6.40MB ± 0% 1.40MB ± 0% -78.08% (p=0.000 n=9+10) name old allocs/op new allocs/op delta IndexClient_Stats-8 59.0 ± 0% 59.0 ± 0% ~ (all equal) TSDBIndex_GetChunkRefs-8 42.0 ± 0% 27.0 ± 0% -35.71% (p=0.000 n=10+10) ``` Signed-off-by: Christian Haudum <christian.haudum@gmail.com>		3 years ago
..
index	Re-organize store related interfaces for better composability (#9249)	3 years ago
indexshipper	Gateway: Log file size (#9465)	3 years ago
series	Re-organize store related interfaces for better composability (#9249)	3 years ago
shipper	Re-organize store related interfaces for better composability (#9249)	3 years ago
tsdb	Force using a buffer from the ChunkRefsPool (#9217)	3 years ago
composite_store.go	Re-organize store related interfaces for better composability (#9249)	3 years ago
composite_store_entry.go	Re-organize store related interfaces for better composability (#9249)	3 years ago
composite_store_test.go	refactor index storage code to index reader/writer interfaces for better monitoring (#7154)	4 years ago
series_store_write.go	Loki: also store the bytes we de-duplicate alongside the count (#9449)	3 years ago
series_store_write_test.go	index-store: fix indexing of chunks overlapping multiple schemas (#8251)	3 years ago