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The service was logging that it could not log: how a full disk turned into a self-feeding outage

The service was logging that it could not log: how a full disk turned into a self-feeding outage

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11 min read
PHP2Shell on PHP 7: patch applied is not patch compiled is not patch working

PHP2Shell on PHP 7: patch applied is not patch compiled is not patch working

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17 min read
An AI agent only checks what it thought of: the stage order that found 9 blocking issues before the first line of code

An AI agent only checks what it thought of: the stage order that found 9 blocking issues before the first line of code

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14 min read
PHP2Shell on PHP 8: docker build --pull succeeded and PHP is still 8.2.29

PHP2Shell on PHP 8: docker build --pull succeeded and PHP is still 8.2.29

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14 min read
PHP 5.6 and PHP2Shell: is it vulnerable, what fixes it, and how to prove you fixed it

PHP 5.6 and PHP2Shell: is it vulnerable, what fixes it, and how to prove you fixed it

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12 min read
PHP2Shell on a mixed fleet: auditing 5.6 to 8.4 and proving each build is actually patched

PHP2Shell on a mixed fleet: auditing 5.6 to 8.4 and proving each build is actually patched

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18 min read
Room 3 froze on a suspending @Transaction: the SQLite driver you pass picks your connection pool

Room 3 froze on a suspending @Transaction: the SQLite driver you pass picks your connection pool

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16 min read
How to never pay a generative API twice: a durable task table, not a retrying job queue

How to never pay a generative API twice: a durable task table, not a retrying job queue

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14 min read
curl error 60: the message text fingerprints the TLS backend, not your certificate

curl error 60: the message text fingerprints the TLS backend, not your certificate

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17 min read
PostgreSQL index bloat: why VACUUM never shrinks an index, and how to measure it with avg_leaf_density

PostgreSQL index bloat: why VACUUM never shrinks an index, and how to measure it with avg_leaf_density

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15 min read
Mass segfaults on a ZFS host: not bad RAM, an unsigned underflow in zfs_fillpage()

Mass segfaults on a ZFS host: not bad RAM, an unsigned underflow in zfs_fillpage()

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12 min read
How to migrate a stateful Docker app off a server with a dying disk

How to migrate a stateful Docker app off a server with a dying disk

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6 min read
Gmail bounced everything the relay sent: three broken auth mechanisms and a silent OpenDKIM

Gmail bounced everything the relay sent: three broken auth mechanisms and a silent OpenDKIM

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11 min read
PostgreSQL conflict with recovery: why both standard fixes make it worse under Patroni

PostgreSQL conflict with recovery: why both standard fixes make it worse under Patroni

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14 min read
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