SUSE Linux Platform Notes
This topic includes the information on the following adjustments:
The I/O scheduler for SUSE Linux is responsible for ordering the I/O requests submitted to a storage device. On SUSE Linux 15, it may default to BFQ (Budget Fair Queueing) which is known to cause performance issues with InterSystems IRIS. InterSystems recommends changing this setting to NONE. For details on changing the I/O scheduler, see the SUSE documentation: Tuning I/O PerformanceOpens in a new tab.
Setting the I/O scheduler to NONE may not be optimal for all use cases. Users should test the system’s application workload after making any changes.
On Linux platforms, if shared memory is allocated in huge pages, they are automatically locked in memory and no further action is required. See Configuring Huge Pages on Linux for information about allocating huge pages.
If not using huge pages, you can configure InterSystems IRIS to lock the shared memory segment in memory to prevent paging. This is described in the LockSharedMemory section of the “memlock” entry in the Configuration Parameter File Reference.
Otherwise, you must increase the maximum size that may be locked into memory. See the Locked-in Memory section of the Red Hat Linux Platform Notes in this chapter for instructions.
To use Kerberos on the SUSE Linux platform, you must install the krb5-devel package in addition to the krb5-libs package. Installing krb5-devel establishes the required symbolic links for using Kerberos. The package is required for production environments, not only development environments. See the SUSE documentationOpens in a new tab web site for more information about these components.