Ns driver
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NAME
- ns_driver - Enumerate socket drivers, open waiting sockets and get some socket driver stats
SYNOPSIS
- ns_driver list
- ns_driver query driverInstance
DESCRIPTION
- This command provides a way to examine the current socket driver stats and open waiting sockets.
- ns_driver list
- Returns a list of socket driver instances in this process which are names of the form virtualservername/module (i.e. myserver/nssock, myserver/nssock2, anotherserver/nsopenssl, etc.)
- ns_driver query driverInstance
- Returns a map with two keys - stats and socks.
- The value of stats is itself a map of stats for the driver instance since server startup like this:
time 1276409140:562735 spins 4078 accepts 192 queued 1251 reads 18034 dropped 0 overflow 0 timeout 0
- where time is the current time in ns_time get format, spins is the number of poll()s performed, accepts is the number of accepted NEW sockets, queued is the number of connections handed off the connection processing pool
- The value of socks is a list of open waiting sockets, where each element is a map but with an additional subelement (without a key) at the end, which is a 7-element list in ns_server all format, except the state will always be "i/o", url and method will "?" and what is supposed to be the running time in seconds.microseconds is instead the accept timestamp.
id 55370218 sock 8432 state readwait idx 22 events 768 revents 768 accept 1276407692:663325 timeout 1276407992:663325 {55370221 124.217.238.150 i/o ? ? 1276407692.663325 0}
- Most of the socks information is only useful for driver debugging purposes with various internal ids and pollfd flags which are platform specific. For administering a server, the overall number of sockets in readwait (prior to connection processing) and closewait (after connection processing) states is useful. Note that only sockets that have not yet been handed over to the connection pool or sockets that have come back from a connection thread show up in this list.
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