Yifan Xu

(*MPPDataPacket).Unmarshal consumes too much memory and causes OOM

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## Bug Report Please answer these questions before submitting your issue. Thanks! ### 1. Minimal reproduce step (Required) When generating the table `lineorder_flat` for SSB test, first use dumpling to...

## Enhancement When execution `EXPLAIN ANALYZE ...`, we can get an execution plan with runtime stats such as `actRows` and `execution info`. If there is a Limit operator on root,...

## Bug Report Please answer these questions before submitting your issue. Thanks! ### 1. Minimal reproduce step (Required) ``` create table t(a int, b int, index idx_a(a)); insert into t...

The result of softmax in convnet example has negative numbers

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I tried to run convnet example in `examples/convnet/main.go` and found the loss doesn't decrease and the accuracy is low(just like random guess). Then I printed out the output of softmax...

TP201 Project3: write benchmark comparison between kvs and sled

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## General Question I am writing TP201 Project3. When doing write benchmark, I find that sled's `set` operation is much slower than `kvs`. I also run the Project3 code in...

test/blocksparse_conv_test.py failed and example/simple.py sometimes raised an invalid memory access error

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**System information** - OS Platform and Distribution: Linux Ubuntu 18.04 - TensorFlow version: 1.13.1 (with GPU support) - Python version: 3.7.7 - CUDA/cuDNN version: 10.0 / 7 - GPU: Tesla...

## Enhancement Currently the logic of building ranges has following problems: 1. No memory control. We can construct the case like #30755 to let TiDB OOM by building too many...

add system variable tidb_opt_range_max_size

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### What is changed, added or deleted? (Required) Add system variable `tidb_opt_range_max_size`. ### Which TiDB version(s) do your changes apply to? (Required) **Tips for choosing the affected version(s):** By default,...

Add note about SELECT CAST(MeN AS CHAR) incompatibility

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### What is changed, added or deleted? (Required) Add note about the incompatibility result of `SELECT CAST(MeN AS CHAR)` between TiDB and MySQL. ### Which TiDB version(s) do your changes...

coprocessor: avoid unnecessary encode when collect_column_stats

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### What is changed and how it works? Issue Number: ref #14231 What's Changed: ```commit-message ``` ### Related changes - PR to update `pingcap/docs`/`pingcap/docs-cn`: - Need to cherry-pick to the...