Redis memory soaring includes: too large data volume, improper data structure selection, configuration problems (such as maxmemory settings too small), and memory leaks. Solutions include: deletion of expired data, use compression technology, selecting appropriate structures, adjusting configuration parameters, checking for memory leaks in the code, and regularly monitoring memory usage.

Redis persistence will take up extra memory, RDB temporarily increases memory usage when generating snapshots, and AOF continues to take up memory when appending logs. Influencing factors include data volume, persistence policy and Redis configuration. To mitigate the impact, you can reasonably configure RDB snapshot policies, optimize AOF configuration, upgrade hardware and monitor memory usage. Furthermore, it is crucial to find a balance between performance and data security.

Redis memory size setting needs to consider the following factors: data volume and growth trend: Estimate the size and growth rate of stored data. Data type: Different types (such as lists, hashes) occupy different memory. Caching policy: Full cache, partial cache, and phasing policies affect memory usage. Business Peak: Leave enough memory to deal with traffic peaks.

Methods to optimize Photoshop performance include: 1. Adjust memory usage to the maximum value in the "Performance" setting, but pay attention to the memory requirements of other programs. 2. Enable GPU acceleration, but make sure the graphics card driver is up to date. 3. Plan the project, merge layers or use smart objects to reduce the number of historical records. 4. Upgrade the hardware to at least 16GB of memory and a GPU with good performance. 5. Use the "Bridge" function to manage files to avoid opening too many documents at the same time. 6. Only install necessary plug-ins to avoid too many plug-ins affecting performance. 7. Ensure efficient and necessary when using the "action" function. These methods can significantly improve Photoshop's productivity.

Mac system maintenance includes: disk management (use OmniDiskSweeper to clean disk space, use disk tools to check disk errors) memory management (use Activity Monitor to monitor memory usage, end over-occupying processes) startup item management (use Linc or LaunchControl to manage startup items, disable unnecessary startup items) system cache cleaning (use CleanMyMac X or manually clean system cache) software update (timely update system and applications) regular backup (use Time Machine to backup data regularly) good usage habits (not installing applications excessively, cleaning files regularly, and monitoring system logs)

There are three main ways to deal with asynchronous operations in JavaScript: 1. Callback functions, which can easily lead to callback hell; 2. Promise, which provides clearer process expression, but may be lengthy when processing multiple operations; 3. async/await, which is based on Promise, and the code is more intuitive, but performance issues need to be paid attention to.

Java's four basic type systems include integer types, floating point types, character types and boolean types. 1. Integer types (byte, short, int, long) are used to store numerical values ??without decimals. Choosing the appropriate type can optimize memory and performance. 2. Float type (float, double) is used for decimal values. Pay attention to accuracy issues. If necessary, BigDecimal is used. 3. Character type (char) is based on Unicode and is suitable for single characters, but String may be required in international applications. 4. Boolean types are used for true and false values, simplifying logical judgments and improving code readability.

The methods to view the running status of Nginx are: use the ps command to view the process status; view the Nginx configuration file /etc/nginx/nginx.conf; use the Nginx status module to enable the status endpoint; use monitoring tools such as Prometheus, Zabbix, or Nagios.