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c1aaad06d8
Add two optional callbacks to the RedisModuleTypeMethods structure, which is `free_effort` and `unlink`. the `free_effort` callback indicates the effort required to free a module memory. Currently, if the effort exceeds LAZYFREE_THRESHOLD, the module memory may be released asynchronously. the `unlink` callback indicates the key has been removed from the DB by redis, and may soon be freed by a background thread. Add `lazyfreed_objects` info field, which represents the number of objects that have been lazyfreed since redis was started. Add `RM_GetTypeMethodVersion` API, which return the current redis-server runtime value of `REDISMODULE_TYPE_METHOD_VERSION`. You can use that when calling `RM_CreateDataType` to know which fields of RedisModuleTypeMethods are gonna be supported and which will be ignored.
32 lines
962 B
Tcl
32 lines
962 B
Tcl
set testmodule [file normalize tests/modules/test_lazyfree.so]
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start_server {tags {"modules"}} {
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r module load $testmodule
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test "modules allocated memory can be reclaimed in the background" {
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set orig_mem [s used_memory]
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set rd [redis_deferring_client]
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# LAZYFREE_THRESHOLD is 64
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for {set i 0} {$i < 10000} {incr i} {
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$rd lazyfreelink.insert lazykey $i
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}
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for {set j 0} {$j < 10000} {incr j} {
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$rd read
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}
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assert {[r lazyfreelink.len lazykey] == 10000}
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set peak_mem [s used_memory]
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assert {[r unlink lazykey] == 1}
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assert {$peak_mem > $orig_mem+10000}
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wait_for_condition 50 100 {
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[s used_memory] < $peak_mem &&
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[s used_memory] < $orig_mem*2 &&
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[string match {*lazyfreed_objects:1*} [r info Memory]]
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} else {
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fail "Module memory is not reclaimed by UNLINK"
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}
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}
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} |