Semaphores

Shared memory

IPC Client/ Server

Client/Server

and Cache

Administrator

When TimesTen uses large pages, the HugePages_Free file in /proc/ meminfo changes.

To view existing kernel parameter settings, log in as root and use:

# /sbin/sysctl -a

To increase the shared memory size to 2048 MB, for example, as root, edit the /etc/sysctl.conf file by adding the line:

kernel.shmmax=2147483648

If your configuration is greater than 8GB, you should also increase the value of the shmall parameter. The value is in KB and should be equal to ceil(SHMMAX/PAGE_SIZE). Page size is generally 4K on x86 systems and 16K on Itanium. For example, for a 64GB data store on Itanium, you should specify the following parameters values:

kernel.shmmax=68719476736

kernel.shmall=4194304

To increase the shared memory size without rebooting, use:

% /sbin/sysctl -w kernel.shmmax=2147483648

If you have your kernel configured with the /proc file system and it is mounted, then the current maximum shared memory segment size (in bytes) can be viewed by the following command:

% cat /proc/sys/kernel/shmmax

You can also change this value by the following command

% echo 2147483648 > /proc/sys/kernel/shmmax

This command has the same effect as the sysctl command.

On Red Hat Linux systems, to enable more than 6 ShmIpc Client/Server connections, add the line:

kernel.sem = "250 32000 128 100"

to the /etc/sysctl.conf file and reboot. This sets the parameter values as follows:

SEMMSL=250

SEMMNS=32000

SEMOPM=100

SEMMNI=100

If you are installing the Cache Connect to Oracle option and plan to use the web-based Cache Administrator or if you plan to use TimesTen client/server configurations, install the following RPM packages:

TimesTen Installation 29

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Oracle Audio Technologies B31679-01 manual To increase the shared memory size without rebooting, use
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B31679-01 specifications

Oracle Audio Technologies has long been known for its commitment to high-end audio equipment that delivers superb sound quality and innovative design. One standout product from the company is the Oracle B31679-01, a remarkable turntable that showcases their expertise in the audio domain.

The B31679-01 embodies advanced engineering principles and a passion for music reproduction. At the heart of its design is a highly rigid yet lightweight chassis that minimizes vibrations, ensuring that the audio signal remains pure and uncolored. This attention to vibration isolation is critical, as even the slightest interference can compromise the clarity and fidelity of the sound. The turntable is constructed using premium materials that enhance performance and aesthetic appeal, adding an element of sophistication to any audio setup.

One of the key features of the Oracle B31679-01 is its sophisticated suspension system. The innovative suspension technology helps decouple the turntable from external vibrations and resonances, creating a stable platform for vinyl playback. This is particularly important in environments with background noise or potential disturbances, allowing users to experience their music as intended.

Another notable characteristic of the B31679-01 is its precision-engineered tonearm. The tonearm is designed for optimal tracking, ensuring that the stylus maintains contact with the record groove, capturing every nuance of the music. By minimizing tracking error and optimizing weight distribution, the tonearm enhances overall soundstage and detail, allowing audiophiles to rediscover their vinyl collection with newfound appreciation.

In terms of motor technology, the Oracle B31679-01 features a high-torque, low-noise motor that provides reliable and consistent speed. This is crucial for vinyl playback, as variations in speed can lead to pitch inaccuracies and a less enjoyable listening experience. The motor's design is engineered to operate quietly, ensuring that no unwanted noise enters the audio signal.

The Oracle B31679-01 also stands out with its customizable features, allowing users to tailor their experience to their personal taste. From cartridge compatibility to adjustable settings, the turntable accommodates a wide range of preferences, making it a versatile choice for both casual listeners and serious audiophiles.

In summary, the Oracle B31679-01 combines advanced engineering, premium materials, and innovative technologies to create a turntable that excels in sound quality and performance. Its focus on vibration isolation, precise tonearm design, reliable motor operation, and customization options make it a distinguished choice for those seeking an exceptional vinyl experience. Oracle Audio Technologies continues to set high standards in the audio industry, and the B31679-01 is a testament to their dedication and expertise.
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