# PostgreSQL 12 → 13 GUC 差异

> PG12 与 PG13 之间新增、boot 默认值变化和移除的核心配置参数。
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> [!NOTE]
> **Fact。** 实测在档数从 317 变为 332；新增 16、boot 默认值变化 3、移除 1。

## 新增参数 {#added}

| 参数 | 类型 | Context | Boot 默认值 | 分类 |
| --- | --- | --- | --- | --- |
| [`autovacuum_vacuum_insert_scale_factor`](/zh/parameters/autovacuum-vacuum-insert-scale-factor/) | `real` | `sighup` | `0.2` | Autovacuum |
| [`autovacuum_vacuum_insert_threshold`](/zh/parameters/autovacuum-vacuum-insert-threshold/) | `integer` | `sighup` | `1000` | Autovacuum |
| [`backtrace_functions`](/zh/parameters/backtrace-functions/) | `string` | `superuser` | `""` (empty string) | Developer Options |
| [`enable_incremental_sort`](/zh/parameters/enable-incremental-sort/) | `bool` | `user` | `on` | Query Tuning / Planner Method Configuration |
| [`hash_mem_multiplier`](/zh/parameters/hash-mem-multiplier/) | `real` | `user` | `1` | Resource Usage / Memory |
| [`ignore_invalid_pages`](/zh/parameters/ignore-invalid-pages/) | `bool` | `postmaster` | `off` | Developer Options |
| [`log_min_duration_sample`](/zh/parameters/log-min-duration-sample/) | `integer` | `superuser` | `-1 ms` | Reporting and Logging / When to Log |
| [`log_parameter_max_length`](/zh/parameters/log-parameter-max-length/) | `integer` | `superuser` | `-1 B` | Reporting and Logging / What to Log |
| [`log_parameter_max_length_on_error`](/zh/parameters/log-parameter-max-length-on-error/) | `integer` | `user` | `0 B` | Reporting and Logging / What to Log |
| [`log_statement_sample_rate`](/zh/parameters/log-statement-sample-rate/) | `real` | `superuser` | `1` | Reporting and Logging / When to Log |
| [`logical_decoding_work_mem`](/zh/parameters/logical-decoding-work-mem/) | `integer` | `user` | `65536 kB` (64 MiB) | Resource Usage / Memory |
| [`maintenance_io_concurrency`](/zh/parameters/maintenance-io-concurrency/) | `integer` | `user` | `10` | Resource Usage / Asynchronous Behavior |
| [`max_slot_wal_keep_size`](/zh/parameters/max-slot-wal-keep-size/) | `integer` | `sighup` | `-1 MB` | Replication / Sending Servers |
| [`wal_keep_size`](/zh/parameters/wal-keep-size/) | `integer` | `sighup` | `0 MB` (0 B) | Replication / Sending Servers |
| [`wal_receiver_create_temp_slot`](/zh/parameters/wal-receiver-create-temp-slot/) | `bool` | `sighup` | `off` | Replication / Standby Servers |
| [`wal_skip_threshold`](/zh/parameters/wal-skip-threshold/) | `integer` | `user` | `2048 kB` (2 MiB) | Write-Ahead Log / Settings |
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## Boot 默认值变化 {#default-changes}

| 参数 | PG12 | PG13 | 分类 |
| --- | --- | --- | --- |
| [`server_version`](/zh/parameters/server-version/) | `12.22 (Debian 12.22-1.pgdg120+1)` | `13.23 (Debian 13.23-1.pgdg13+1)` | Preset Options |
| [`server_version_num`](/zh/parameters/server-version-num/) | `120022` | `130023` | Preset Options |
| [`ssl_min_protocol_version`](/zh/parameters/ssl-min-protocol-version/) | `TLSv1` | `TLSv1.2` | Connections and Authentication / SSL |
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## 移除参数 {#removed}

| 参数 | 最后类型 | Context | 最后 Boot 默认值 | 分类 |
| --- | --- | --- | --- | --- |
| [`wal_keep_segments`](/zh/parameters/wal-keep-segments/) | `integer` | `sighup` | `0` | Replication / Sending Servers |
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## 计算方法 {#method}

三张清单直接比较固定环境中的 PG12 与 PG13 `pg_settings` 快照。默认值变化使用 `boot_val` 与 `unit` 的组合；`setting` 不参与判定，以免把 `initdb` 生成值误当作编译时默认值。

- [机器可读差异数据](/data/diffs.json)
- [完整 GUC JSONL](/data/guc.jsonl)