LiJie20190102

@sketchmind @SbloodyS Excuse me, when will this PR be closed? We found that many scenes need resources to be uploaded again.

[standalone-9_0.log](https://github.com/milvus-io/milvus/files/11279075/standalone-9_0.log) [standalone-9_1.log](https://github.com/milvus-io/milvus/files/11279076/standalone-9_1.log) [standalone-9_2.log](https://github.com/milvus-io/milvus/files/11279078/standalone-9_2.log) I recently loaded it once, and the error log of milvus is as follows： 

> above the log, here comes more than 40000 segments， did you call `flush` too often? @LiJie20190102 yes

That is to say, does flushing too frequently cause data to not be loaded into memory?

> > close my issue, the length Text property value should less than 65535. > > we know the limitation, and consider add an option for user to modify it...

I want to implement this function, can it be assigned to me

> > I want to implement this function, can it be assigned to me > > @LiJie20190102 If u want to config property length, we could reopen this issue &...

I think a good solution is not to limit the length of vertex/edge ID or attributes, but to dynamically change the attribute values of org.apache.hugegraph.backend.serializer.BytesBuffer, such as UINT8_ MAX, because...

 After my testing, I found that there are indeed more map objects created. That is to say, when I use the String type, I create more map objects; But...

@imbajin