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docs (level 101): fix typos, punctuation, formatting (#160)

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* docs: formatted for readability

* docs: rephrased and added punctuation

* docs: fix typos, punctuation, formatting

* docs: fix typo and format

* docs: fix caps and formatting

* docs: fix punctuation and formatting

* docs: capitalized SQL commands, fixed puntuation, formatting

* docs: fix punctuation

* docs: fix punctuation and formatting

* docs: fix caps,punctuation and formatting

* docs: fix links, punctuation, formatting

* docs: fix code block formatting

* docs: fix punctuation, indentation and formatting
This commit is contained in:
Jana R
2024-07-28 17:38:19 +05:30
committed by GitHub
parent bdcc6856ed
commit 4239ecf473
58 changed files with 1522 additions and 1367 deletions
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courses/level101/databases_sql/innodb.md
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@@ -1,6 +1,6 @@
### Why should you use this?
General purpose, row level locking, ACID support, transactions, crash recovery and multi-version concurrency control etc.
General purpose, row level locking, ACID support, transactions, crash recovery and multi-version concurrency control, etc.
### Architecture
@@ -11,7 +11,7 @@ General purpose, row level locking, ACID support, transactions, crash recovery a
### Key components:
* Memory:
* Buffer pool: LRU cache of frequently used data(table and index) to be processed directly from memory, which speeds up processing. Important for tuning performance.
* Buffer pool: LRU cache of frequently used data (table and index) to be processed directly from memory, which speeds up processing. Important for tuning performance.
* Change buffer: Caches changes to secondary index pages when those pages are not in the buffer pool and merges it when they are fetched. Merging may take a long time and impact live queries. It also takes up part of the buffer pool. Avoids the extra I/O to read secondary indexes in.
* Adaptive hash index: Supplements InnoDB’s B-Tree indexes with fast hash lookup tables like a cache. Slight performance penalty for misses, also adds maintenance overhead of updating it. Hash collisions cause AHI rebuilding for large DBs.
* Log buffer: Holds log data before flush to disk.