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new 6543e400648 [fix](doc) correct write_buffer_size default value (200MB)
(#3736)
6543e400648 is described below
commit 6543e400648f3ec97530c9a4a89e58bd23493da8
Author: boluor <[email protected]>
AuthorDate: Fri May 22 10:35:18 2026 -0700
[fix](doc) correct write_buffer_size default value (200MB) (#3736)
## Summary
The BE config `write_buffer_size` page states the default is **100MB
(104,857,600)**, but the actual default has been **200MB (209,715,200)**
since 2.1.0 — changed in apache/doris#30749
(`DEFINE_mInt64(write_buffer_size, "209715200")`).
Updated both the "default size is 100MB" prose and the `Default value`
field across the EN and zh `admin-manual/config/be-config` pages
(current / 2.1 / 3.x / 4.x).
The separate `write_buffer_size_for_agg` config (which genuinely
defaults to 100MB) is left unchanged.
Reported in #3497.
## Test plan
- [x] Confirmed `write_buffer_size = 209715200` in BE source
(`be/src/common/config.cpp`), changed in #30749 (merged into 2.1.0).
- [x] Verified `write_buffer_size_for_agg` (104857600) and other
104857600-valued configs (e.g. `segcompaction_candidate_max_bytes`) were
not touched.
- [x] Dead-link check passes.
- [ ] CI build.
Closes #3497
Co-authored-by: Claude Opus 4.7 (1M context) <[email protected]>
---
docs/admin-manual/config/be-config.md | 4 ++--
.../current/admin-manual/config/be-config.md | 4 ++--
.../version-2.1/admin-manual/config/be-config.md | 4 ++--
.../version-3.x/admin-manual/config/be-config.md | 4 ++--
.../version-4.x/admin-manual/config/be-config.md | 4 ++--
versioned_docs/version-2.1/admin-manual/config/be-config.md | 4 ++--
versioned_docs/version-3.x/admin-manual/config/be-config.md | 4 ++--
versioned_docs/version-4.x/admin-manual/config/be-config.md | 4 ++--
8 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/docs/admin-manual/config/be-config.md
b/docs/admin-manual/config/be-config.md
index d306ba7eb60..343420db2ae 100644
--- a/docs/admin-manual/config/be-config.md
+++ b/docs/admin-manual/config/be-config.md
@@ -943,8 +943,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* Description: The size of the buffer before flashing
- - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 100MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
-* Default value: 104,857,600
+ - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 200MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
+* Default value: 209,715,200
#### `remote_storage_read_buffer_mb`
diff --git
a/i18n/zh-CN/docusaurus-plugin-content-docs/current/admin-manual/config/be-config.md
b/i18n/zh-CN/docusaurus-plugin-content-docs/current/admin-manual/config/be-config.md
index b28e9c330b5..32514d96689 100644
---
a/i18n/zh-CN/docusaurus-plugin-content-docs/current/admin-manual/config/be-config.md
+++
b/i18n/zh-CN/docusaurus-plugin-content-docs/current/admin-manual/config/be-config.md
@@ -934,8 +934,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* 描述：刷写前缓冲区的大小
- - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 100MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
-* 默认值：104857600
+ - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 200MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
+* 默认值：209715200
#### `remote_storage_read_buffer_mb`
diff --git
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.1/admin-manual/config/be-config.md
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.1/admin-manual/config/be-config.md
index 13719d4ec33..3b9644b0966 100644
---
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.1/admin-manual/config/be-config.md
+++
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.1/admin-manual/config/be-config.md
@@ -1008,8 +1008,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* 描述：刷写前缓冲区的大小
- - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 100MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
-* 默认值：104857600
+ - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 200MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
+* 默认值：209715200
#### `remote_storage_read_buffer_mb`
diff --git
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-3.x/admin-manual/config/be-config.md
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-3.x/admin-manual/config/be-config.md
index 41bc04f0e2b..7761120759b 100644
---
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-3.x/admin-manual/config/be-config.md
+++
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-3.x/admin-manual/config/be-config.md
@@ -1007,8 +1007,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* 描述：刷写前缓冲区的大小
- - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 100MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
-* 默认值：104857600
+ - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 200MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
+* 默认值：209715200
#### `remote_storage_read_buffer_mb`
diff --git
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-4.x/admin-manual/config/be-config.md
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-4.x/admin-manual/config/be-config.md
index b28e9c330b5..32514d96689 100644
---
a/i18n/zh-CN/docusaurus-plugin-content-docs/version-4.x/admin-manual/config/be-config.md
+++
b/i18n/zh-CN/docusaurus-plugin-content-docs/version-4.x/admin-manual/config/be-config.md
@@ -934,8 +934,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* 描述：刷写前缓冲区的大小
- - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 100MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
-* 默认值：104857600
+ - 导入数据在 BE 上会先写入到一个内存块，当这个内存块达到阈值后才会写回磁盘。默认大小是 200MB。过小的阈值可能导致 BE
上存在大量的小文件。可以适当提高这个阈值减少文件数量。但过大的阈值可能导致 RPC 超时
+* 默认值：209715200
#### `remote_storage_read_buffer_mb`
diff --git a/versioned_docs/version-2.1/admin-manual/config/be-config.md
b/versioned_docs/version-2.1/admin-manual/config/be-config.md
index 3b7937a0da5..085360baed5 100644
--- a/versioned_docs/version-2.1/admin-manual/config/be-config.md
+++ b/versioned_docs/version-2.1/admin-manual/config/be-config.md
@@ -1002,8 +1002,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* Description: The size of the buffer before flashing
- - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 100MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
-* Default value: 104,857,600
+ - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 200MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
+* Default value: 209,715,200
#### `remote_storage_read_buffer_mb`
diff --git a/versioned_docs/version-3.x/admin-manual/config/be-config.md
b/versioned_docs/version-3.x/admin-manual/config/be-config.md
index 8763b09fbec..f3c31a762d3 100644
--- a/versioned_docs/version-3.x/admin-manual/config/be-config.md
+++ b/versioned_docs/version-3.x/admin-manual/config/be-config.md
@@ -946,8 +946,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* Description: The size of the buffer before flashing
- - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 100MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
-* Default value: 104,857,600
+ - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 200MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
+* Default value: 209,715,200
#### `remote_storage_read_buffer_mb`
diff --git a/versioned_docs/version-4.x/admin-manual/config/be-config.md
b/versioned_docs/version-4.x/admin-manual/config/be-config.md
index d306ba7eb60..343420db2ae 100644
--- a/versioned_docs/version-4.x/admin-manual/config/be-config.md
+++ b/versioned_docs/version-4.x/admin-manual/config/be-config.md
@@ -943,8 +943,8 @@ BaseCompaction:546859:
#### `write_buffer_size`
* Description: The size of the buffer before flashing
- - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 100MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
-* Default value: 104,857,600
+ - Imported data is first written to a memory block on the BE, and only
written back to disk when this memory block reaches the threshold. The default
size is 200MB. too small a threshold may result in a large number of small
files on the BE. This threshold can be increased to reduce the number of files.
However, too large a threshold may cause RPC timeouts
+* Default value: 209,715,200
#### `remote_storage_read_buffer_mb`
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