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<div style="font-size:18px;margin:0;font-weight:700;color:var(--text)">DB Browser (SQLCipher) — Windows</div>
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<div class="kicker">Batching • WAL • PRAGMAs • Indexing</div>
<h1 id="title" class="title">Performance Tips for DB Browser (SQLCipher)</h1>
<p class="lead">Encryption adds work, but smart practices keep things snappy. Use transactions, enable WAL where appropriate, add the right indexes and choose practical PRAGMAs for your hardware and workload.</p>
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<strong>At a glance</strong>
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<li>Wrap writes in transactions</li>
<li>Use WAL for concurrent reads</li>
<li>Add indexes that match your queries</li>
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<h2 style="margin:0 0 6px 0">Transactions and batching</h2>
<ul class="list">
<li>Group many INSERT/UPDATE operations inside a single transaction to reduce fsync overhead.</li>
<li>For very large loads, import into a staging table, then transform with SQL.</li>
<li>Validate row counts and sample records after bulk operations.</li>
</ul>
<p class="muted">See also: <a href="/csv-import-export.html">CSV import/export</a></p>
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<h2 style="margin:0 0 6px 0">WAL and concurrency</h2>
<p class="muted">Write‑Ahead Logging (WAL) can improve read concurrency and reduce writer stalls. It’s a trade‑off: larger file sets and different fs patterns.</p>
<ul class="list">
<li>Enable WAL for read‑heavy workloads; test for your environment.</li>
<li>Use checkpoints after large writes to keep WAL size in check.</li>
<li>Ensure tools accessing the DB understand WAL mode.</li>
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<p class="muted">Commands: <a href="/cli-commands.html">SQL/PRAGMA cheatsheet</a></p>
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<h2 style="margin:0 0 6px 0">Indexing strategy</h2>
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<li>Create indexes for columns in WHERE, JOIN and ORDER BY clauses.</li>
<li>Avoid over‑indexing; indexes cost disk and slow down writes.</li>
<li>For one‑off ETL, add temporary indexes and drop them afterward.</li>
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<p class="muted">Need examples? See <a href="/cli-commands.html">SQL/PRAGMA cheatsheet</a></p>
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<h2 style="margin:0 0 6px 0">Practical PRAGMAs (choose sensibly)</h2>
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<li><strong>journal_mode</strong>: WAL for read concurrency; ROLLBACK for simple, single‑user cases.</li>
<li><strong>synchronous</strong>: Balance durability and speed; test NORMAL vs FULL for your use.</li>
<li><strong>cache_size</strong>: Increase for big queries if memory allows.</li>
<li><strong>temp_store</strong>: Memory can speed up sorts; ensure RAM is sufficient.</li>
</ul>
<div class="warn">Never change PRAGMAs blindly in production databases. Test with realistic data and back up before tuning.</div>
<p class="muted">Apply via SQL editor in DB Browser or see <a href="/cli-commands.html">cheatsheet</a>.</p>
</section>
<!-- Large CSV imports -->
<section style="margin-top:18px" class="card">
<h2 style="margin:0 0 6px 0">Large CSV imports</h2>
<ul class="list">
<li>Import in chunks; keep transactions reasonably sized.</li>
<li>Disable non‑critical triggers during bulk load; re‑enable afterward.</li>
<li>Normalize and clean data first (types, NULLs, whitespace).</li>
</ul>
<p class="muted">Workflow details: <a href="/csv-import-export.html">CSV import/export</a></p>
</section>
<!-- Cipher & hardware considerations -->
<section style="margin-top:18px" class="card">
<h2 style="margin:0 0 6px 0">Cipher and hardware considerations</h2>
<ul class="list">
<li>Higher KDF iterations cost CPU on open; choose values your machines can handle.</li>
<li>SSD vs HDD makes a big difference for write‑heavy tasks.</li>
<li>Keep parameters consistent across environments to avoid re‑work.</li>
</ul>
<p class="muted">Background: <a href="/sqlcipher.html">SQLCipher basics</a></p>
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<h2 style="margin:0 0 6px 0">Next steps</h2>
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<li><a href="/cli-commands.html">SQL/PRAGMA cheatsheet</a></li>
<li><a href="/troubleshooting.html">Troubleshooting hub</a></li>
<li><a href="/csv-import-export.html">Import & export CSV</a></li>
</ul>
</div>
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<ul class="muted" style="padding-left:18px;margin:8px 0 0">
<li><a href="/sqlcipher.html">SQLCipher basics</a></li>
<li><a href="/encrypt-decrypt-sqlcipher.html">Encrypt/Decrypt guide</a></li>
<li><a href="/download.html">Get the portable build</a></li>
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