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grpc-java/netty/src
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Kun Zhang 89cd64328d
netty: provide an option to lower netty allocator chunk size from 16MB to 2MB (#6407) 
This would reduce the amount of direct buffer allocations, especially with light traffic. This should mitigate internal issue b/143075435

The change is currently optional and is only effective if system property "io.grpc.netty.useCustomAllocator" is set to "true" ignoring the case.

Internal benchmark results (median of 5 runs) doesn't show any significant change:
```
                          Before (STDEV)           After (STDEV)
grpc-java-java-multi-qps-integrity_only
Actual QPS               717,848 (7,445)         715,061 (2,122) 
QPS per Client CPU        23,768   (799)          23,842   (295)

grpc-java-java-multi-throughput-integrity_only
Actual QPS                35,631   (204)          35,298    (25) 
QPS per Client CPU         3,362    (56)           3,316    (18)

grpc-java-java-single-latency-integrity_only
Median latency (us)          130  (1.82)             125  (5.36)

grpc-java-java-single-throughput-integrity_only
Actual QPS                    593 (5.14)             587  (3.76)
QPS per Client CPU            502 (4.51)             494  (6.92)

```
 		2019-11-14 15:50:11 -08:00
..
jmh/java/io/grpc/netty all: update Error Prone to 2.3.2 2018-10-19 13:08:36 -07:00
main netty: provide an option to lower netty allocator chunk size from 16MB to 2MB (#6407) 2019-11-14 15:50:11 -08:00
test/java/io/grpc/netty netty: provide an option to lower netty allocator chunk size from 16MB to 2MB (#6407) 2019-11-14 15:50:11 -08:00