What happens to your scraper when a proxy pool is too small - London Business News | Londonlovesbusiness.com

"A proxy pool doesn't have to be empty to be exhausted - it just needs to be too small relative to request volume and target site sensitivity. Every IP in a residential pool has a reputation score. Sites that deploy bot management systems track request history at the IP level. When a pool is small and rotation cycles through the same addresses quickly, each individual IP accumulates request history faster."

"The math is simple: if a site's detection threshold is 100 requests per IP per hour, 500 IPs handling 10,000 requests per hour average 20 requests per IP - well under the threshold. Shrink that to 50 IPs, and the average jumps to 200, which is double the threshold on every single address."

"Residential IPs within a small pool often cluster around a limited range of ASNs (Autonomous System Numbers). When several IPs from the same subnet get flagged, many sites implement subnet-wide blocks instead of banning addresses individually. A 50-IP pool from three ASNs can effectively diminish effectiveness through coordinated blocking."

Proxy pool sizing is a critical infrastructure decision with significant consequences when miscalculated. Residential proxies are essential for price monitoring, SERP tracking, and ad verification at scale. Industry data shows 65.8% of scraping professionals increased proxy usage year-over-year, with over 62% experiencing rising infrastructure costs due to stronger anti-bot protections. Pool exhaustion occurs not when pools are empty, but when they're too small relative to request volume and target site sensitivity. Undersized pools cause individual IPs to accumulate request history rapidly, triggering detection thresholds. Additionally, small pools often cluster around limited ASN ranges, leading to subnet-level bans when multiple IPs get flagged, effectively blocking entire network segments.

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