Hello all Excuse me.. My website is usually 100 people online, when in weekend will be bouble so I found this condition is about "Burst RAM". I am using the same standard packet VPS at another VPS provider is called "<<<snipped>>" KnownHost VPS XL min RAM: 320MB / 1 GB Burst RAM [[email protected] ~]# free -m total used free shared buffers cached Mem: 320 78 241 0 0 0 -/+ buffers/cache: 78 241 Swap: 0 0 0 [[email protected] ~]# <<<snipped>> min RAM: 256MB / 1 GB Burst RAM [[email protected] ~]# free -m total used free shared buffers cached Mem: 1024 239 784 0 0 0 -/+ buffers/cache: 239 784 Swap: 0 0 0 Yesterday was a nightmare for me, When the memory had been used fully, the website became slow down very much, almot could not work. I didn't feel the "Burst Ram" had to work with any effect. After I moved back to <<<snipped>>, the memory was used 470-510 MB, website ran good. Is Knownhost's Burst RAM exist? If Yes how can I use it? Thank you!