perf(spanner): add gRPC channel pooling#5491
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olavloite wants to merge 2 commits intogoogleapis:mainfrom
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perf(spanner): add gRPC channel pooling#5491olavloite wants to merge 2 commits intogoogleapis:mainfrom
olavloite wants to merge 2 commits intogoogleapis:mainfrom
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Applications that use Spanner for high throughput often need more than one gRPC channel in order to achieve the best possible performance. Having more than one channel both increases the number of concurrent streams that an application can have open at any time (the limit is 100 per gRPC channel), and distributes the load that is generated by the application across multiple Spanner frontends.
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## main #5491 +/- ##
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Coverage 97.73% 97.74%
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Files 218 218
Lines 49013 49236 +223
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olavloite
commented
Apr 22, 2026
| let transport = | ||
| crate::generated::gapic_dataplane::transport::Spanner::new(config.clone()).await?; | ||
| let grpc_client = transport.inner.clone(); | ||
| let num_channels = std::env::var("SPANNER_NUM_CHANNELS") |
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We will add a 'normal' configuration option for this as well in a follow-up PR (assuming that we go with this solution)
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I am not sure if this helps, but consider:
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Applications that use Spanner for high throughput often need more than one gRPC channel in order to achieve the best possible performance. Having more than one channel both increases the number of concurrent streams that an application can have open at any time (the limit is 100 per gRPC channel), and distributes the load that is generated by the application across multiple Spanner frontends.
See also go/spanner-rust-channel-pool