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Informations about the package doctrine-session-handler

doctrine-session-handler

Index on expiresAt (required)

Add an index on the expiresAt column. Cleaning up expired sessions filters by it, and without the index it degrades into a full table scan over the whole (typically large) session table:

An index cannot be declared in a trait (it is a class-level attribute), so it has to be added to your entity.

Cleaning up expired sessions

PHP's inline garbage collection (session.gc_probability) deletes all expired sessions in a single statement in the middle of a request. On a large session table that holds locks over a wide range and on a Galera cluster it overflows the write-set limit:

The cleanup then keeps failing, expired sessions are never removed, the table grows without bound and session I/O saturates PHP-FPM.

Therefore: turn off inline GC and clean up from cron in batches.

Handler::gc() (inline GC) is batched too and by default deletes at most one batch, so even when it does run it cannot overflow the write-set. You can tune it via the constructor:

Keep the session table small

Sessions are created for every visitor without a cookie (including bots), so also consider a short session.expiration and avoid touching the session on requests that do not need it — anything writing to the session (flash messages, storeRequest(), CSRF tokens) creates a row.


All versions of doctrine-session-handler with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
doctrine/dbal Version ^3.6 || ^4.0
doctrine/orm Version ^2.14 || ^3.0
symfony/console Version ^6.0 || ^7.0 || ^8.0
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