Search notes:

Registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

DataBasePath

The default value of DataBasePath is %SystemRoot%\System32\drivers\etc

KeepAliveTime

The value of KeepAliveTime determines the interval in milliseconds on idle connections before TCP sends a keep-alive transmission (which is used to determine if the other participant in the TCP connection is still responsive).
The default value seems to be 7200000 which equals to 2 hours.
This value is possibly not used anymore.
As per Oracle's MOS Note 226202.1, TCP Keep Alive needs to be active to prevent dead sessions from accumulating when SQL*Net Dead Connection Detection (SQLNET.EXPIRE_TIME) is set to 0 or unset in the sqlnet.ora file.
See also section 4.2.3.6 TCP Keep-Alives in RFC 1122.

Index

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:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Windows/...', 1788563420, '216.73.216.30', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Windows/registry/tree/HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/Tcpip/Parameters/index(51): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78