Search notes:

/proc/sys/fs/epoll/max_user_watches

proc/sys/fs/epoll/max_user_watches specifies the (or a?) limit on the total number of file descriptors that a user can register across all epoll instances on the system.

This limit is per real user ID.

The default value is 4% of the available low memory, divceded by the registration cost in bytes.

Each registered file descriptor occupies roughly 160 bytes on a 64-bit kernel.

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Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:51 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(51): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(66): id_of(Object(PDO), 'uri', '/notes/Linux/fh...') #2 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1759561859, '216.73.216.149', 'Mozilla/5.0 App...', NULL) #3 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/proc/sys/fs/epoll/max_user_watches(40): insert_webrequest() #4 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 51