The Operating System (OS) connections and metrics fail intermittently in the database dashboard for Oracle agents on Linux.
The hard nofile and soft nofile on the fglam host shows 65536, which is more than enough for the database cartridge.
Other system configuration files, like /etc/profile.d/limits.sh & /etc/security/limits.conf contain no file limitations.
WORKAROUND
STATUS
FGL-14364 "Errors in Foglight's log should be reported as a alarms "submitted for consideration in future release of Foglight.
The V5.7.5.8 and lower versions of the FglAM use a default open file limit of 512 in the startup script.
The V5.9.1 and higher versions of the FglAM use a default open file limit of 4096 in the startup script.
The open file limit was increased to 4096 under Enhancement request FAM-6996 in the V5.9.1 FglAM.
FAM-6996: Increase the number of open file descriptors specified by the "fglam-init-script.sh" from 512 to a more generous allowance
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