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我有一个大约 43GB 的数据库。当我计算pg_largeobject 表的大小时，它也给了我43GB：

SELECT pg_size_pretty(pg_table_size('pg_largeobject'));

当我通过以下命令对所有大对象的大小求和时：

SELECT sum(length(pg.data)) FROM pg_largeobject pg;

它给了我32.5GB。我试图通过以下方式取消链接除理想对象之外的所有对象：

SELECT lo_unlink(l.loid)
FROM   pg_largeobject l
GROUP  BY loid
HAVING (NOT EXISTS (SELECT 1 FROM data_file t WHERE t.file_content = l.loid))
AND    (NOT EXISTS (SELECT 1 FROM license t WHERE t.attachment_content = l.loid))
AND    (NOT EXISTS (SELECT 1 FROM personal_license t WHERE t.attachment_content = l.loid))
AND    (NOT EXISTS (SELECT 1 FROM scenario t WHERE t.scenario_file = l.loid))
AND    (NOT EXISTS (SELECT 1 FROM service_result t WHERE t.content = l.loid));

并运行 VACUUM：

VACUUM FULL ANALYZE pg_largeobject;

当我尝试一次时，它的大小从 47GB 减小到了 43GB，但我找不到丢失的 10.5GB你知道那里可以存储什么或者我应该怎么做吗？

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