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perf(TLS): set default sndbuf and recbuf to 4K 

Without using default values, sockets will be opened with OS default
buffer sizes. OS default is set by linux aligning to the host memory
size that large memory has larger OS default.

Now more and more user run EMQX in container which has large OS memory
but the container max memory is limited by cgroup that could be very
small amount compared to the OS total memory size.

To eliminate uncertainty, it is better to have the default value set.
This commit is contained in:
William Yang 2022-09-16 20:18:45 +02:00
parent 91dd2fc97f
commit 97fb8c1133
2 changed files with 5 additions and 3 deletions
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4
CHANGES-4.3.md
View File

@ -15,7 +15,9 @@ File format:
- TLS listener memory usage optimization - TLS listener memory usage optimization
new option 'hibernate_after' to hibernate TLS process after idling new option 'hibernate_after' to hibernate TLS process after idling
- TLS listener default buffer size to 4KB
Eliminate uncertainty that the buffer size is set by OS default
## v4.3.20 ## v4.3.20
### Bug fixes ### Bug fixes

4
etc/emqx.conf
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@ -1609,14 +1609,14 @@ listener.ssl.external.ciphers = TLS_AES_256_GCM_SHA384,TLS_AES_128_GCM_SHA256,TL
## See: listener.tcp.$name.recbuf ## See: listener.tcp.$name.recbuf
## ##
## Value: Bytes ## Value: Bytes
## listener.ssl.external.recbuf = 4KB listener.ssl.external.recbuf = 4KB
## The TCP send buffer(os kernel) for internal MQTT connections. ## The TCP send buffer(os kernel) for internal MQTT connections.
## ##
## See: listener.tcp.$name.sndbuf ## See: listener.tcp.$name.sndbuf
## ##
## Value: Bytes ## Value: Bytes
## listener.ssl.external.sndbuf = 4KB listener.ssl.external.sndbuf = 4KB
## The size of the user-level software buffer used by the driver. ## The size of the user-level software buffer used by the driver.
## ##