Performance and Optimization

Cache, compression, connection limits and bandwidth control.

• Which features does TR7 offer to speed up my application?LB-12-001
• Can I do caching on TR7; what are the default settings?LB-12-002
• How is compression (GZIP / DEFLATE) enabled; which content types should be compressed?LB-12-003
• What do the values in the Timeouts profile (HTTP Keepalive Timeout, HTTP Request Timeout, Connect, Server, Client, Queue, Tunnel(Websocket) Timeout, Client FIN, Server FIN) mean?LB-12-004
• What is the vService Limits profile; what are the default limits?LB-12-005
• Which content gets cached; how do I define cache rules?LB-12-006
• How do I know a response came from the cache (Cached(HIT) Header Name, default value TRCACHE)?LB-12-007
• Are the query string and Host Header part of the cache key; can I change this?LB-12-008
• How do I prevent user-specific content from being cached by mistake?LB-12-009
• Old content is still being served after an application update; what should I do?LB-12-010
• What should the Compression Level be; what is its effect on CPU?LB-12-011
• Why is the request cut off during long operations (report, file upload); which timeout should I increase?LB-12-012
• My WebSocket connections drop after a certain time; what should I do?LB-12-013
• What happens when the connection limit is reached?LB-12-014
• Can I limit bandwidth (download / upload)?LB-12-015
• The site is slow; how do I tell whether the problem is in TR7 or in the backend?LB-12-016
• What is Dynamic Caching, and when should it be used?LB-12-017
• What does the Offloading option in the Compression profile do?LB-12-018
• How do cache and compression work together?LB-12-019
• What is HTTP TCP Multiplexing; how does it reduce the number of backend connections?LB-12-020
• What should I consider in the Timeouts and vService Limits profiles for Microsoft Exchange (OWA / ActiveSync)?LB-12-021
• How does the queue work; how long do requests wait at most?LB-12-022
• What is Max. Failed Connection Retries used for?LB-12-023
• What is Buffer size used for; when should I change it?LB-12-024
• What is QoS; how do I reserve dedicated CPU/memory resources for critical vServices?LB-12-025
• What do the Memory Limit, Cores, CPU Priority, Cpu usage limit and Inline Mode settings in QoS do?LB-12-026