DOKK / manpages / debian 12 / libmemcached-dev / memcached_touch_by_key.3.en
MEMCACHED_TOUCH_BY_KEY(3) libmemcached-awesome MEMCACHED_TOUCH_BY_KEY(3)

memcached_touch_by_key - libmemcached Documentation

#include <libmemcached/memcached.h>
Compile and link with -lmemcached

  • ptr -- pointer to initialized memcached_st struct
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds

memcached_return_t indicating success


  • ptr -- pointer to initialized memcached_st struct
  • group_key -- the key namespace
  • group_key_length -- the length of group_key without any terminating zero
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds

memcached_return_t indicating success


memcached_touch() is used to update the expiration time on an existing key. memcached_touch_by_key() works the same, but it takes a master key to find the given value.

A value of type memcached_return_t is returned. On success that value will be MEMCACHED_SUCCESS. Use memcached_strerror() to translate this value to a printable string.

memcached(1) libmemcached(3) memcached_strerror(3)

March 6, 2023 1.1