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Increase default maxAllowedPacket size. #1411

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Merged
merged 2 commits into from
Apr 14, 2023
Merged

Increase default maxAllowedPacket size. #1411

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7303fbc
Increase default MaxAllowedPacket to 64MiB
methane Apr 11, 2023
ae315d6
Update README
methane Apr 11, 2023
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -282,7 +282,7 @@ Please keep in mind, that param values must be [url.QueryEscape](https://golang.
##### `maxAllowedPacket`
```
Type: decimal number
Default: 4194304
Default: 64*1024*1024
```

Max packet size allowed in bytes. The default value is 4 MiB and should be adjusted to match the server settings. `maxAllowedPacket=0` can be used to automatically fetch the `max_allowed_packet` variable from server *on every connection*.
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2 changes: 1 addition & 1 deletion const.go
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Expand Up @@ -10,7 +10,7 @@ package mysql

const (
defaultAuthPlugin = "mysql_native_password"
defaultMaxAllowedPacket = 4 << 20 // 4 MiB
defaultMaxAllowedPacket = 64 << 20 // 64 MiB. See https://github.com/go-sql-driver/mysql/issues/1355
minProtocolVersion = 10
maxPacketSize = 1<<24 - 1
timeFormat = "2006-01-02 15:04:05.999999"
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2 changes: 1 addition & 1 deletion errors.go
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Expand Up @@ -27,7 +27,7 @@ var (
ErrOldProtocol = errors.New("MySQL server does not support required protocol 41+")
ErrPktSync = errors.New("commands out of sync. You can't run this command now")
ErrPktSyncMul = errors.New("commands out of sync. Did you run multiple statements at once?")
ErrPktTooLarge = errors.New("packet for query is too large. Try adjusting the 'max_allowed_packet' variable on the server")
ErrPktTooLarge = errors.New("packet for query is too large. Try adjusting the `Config.MaxAllowedPacket`")
ErrBusyBuffer = errors.New("busy buffer")

// errBadConnNoWrite is used for connection errors where nothing was sent to the database yet.
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