com.sleepycat.db
Class DbMpoolStat

java.lang.Object
  |
  +--com.sleepycat.db.DbMpoolStat

public class DbMpoolStat

extends Object

The DbMpoolStat object is used to return memory pool statistics.

Field Summary

int	st_alloc Number of page allocations.
int	st_alloc_buckets Number of hash buckets checked during allocation.
int	st_alloc_max_buckets Maximum number of hash buckets checked during an allocation.
int	st_alloc_max_pages Maximum number of pages checked during an allocation.
int	st_alloc_pages Number of pages checked during allocation.
int	st_bytes Bytes of cache (total cache size is st_gbytes + st_bytes).
int	st_cache_hit Requested pages found in the cache.
int	st_cache_miss Requested pages not found in the cache.
int	st_gbytes Gigabytes of cache (total cache size is st_gbytes + st_bytes).
int	st_hash_buckets Number of hash buckets in buffer hash table.
int	st_hash_examined Total number of hash elements traversed during hash table lookups.
int	st_hash_longest The longest chain ever encountered in buffer hash table lookups.
int	st_hash_max_wait The maximum number of times any hash bucket lock was waited for by a thread of control.
int	st_hash_nowait The number of times that a thread of control was able to obtain a hash bucket lock without waiting.
int	st_hash_searches Total number of buffer hash table lookups.
int	st_hash_wait The number of times that a thread of control was forced to wait before obtaining a hash bucket lock.
int	st_map Requested pages mapped into the process' address space (there is no available information about whether or not this request caused disk I/O, although examining the application page fault rate may be helpful).
int	st_ncache Number of caches.
int	st_page_clean Clean pages currently in the cache.
int	st_page_create Pages created in the cache.
int	st_page_dirty Dirty pages currently in the cache.
int	st_page_in Pages read into the cache.
int	st_page_out Pages written from the cache to the backing file.
int	st_page_trickle Dirty pages written using the DbEnv.memoryPoolTrickle method.
int	st_pages Pages in the cache.
int	st_region_nowait The number of times that a thread of control was able to obtain a region lock without waiting.
int	st_region_wait The number of times that a thread of control was forced to wait before obtaining a region lock.
int	st_regsize Individual cache size.
int	st_ro_evict Clean pages forced from the cache.
int	st_rw_evict Dirty pages forced from the cache.

Constructor Summary

DbMpoolStat()

Method Summary

String

toString() Provide a string representation of all the fields contained within this class.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

st_gbytes

public int st_gbytes

Gigabytes of cache (total cache size is st_gbytes + st_bytes).

st_bytes

public int st_bytes

Bytes of cache (total cache size is st_gbytes + st_bytes).

st_ncache

public int st_ncache

Number of caches.

st_regsize

public int st_regsize

Individual cache size.

st_map

public int st_map

Requested pages mapped into the process' address space (there is no available information about whether or not this request caused disk I/O, although examining the application page fault rate may be helpful).

st_cache_hit

public int st_cache_hit

Requested pages found in the cache.

st_cache_miss

public int st_cache_miss

Requested pages not found in the cache.

st_page_create

public int st_page_create

Pages created in the cache.

st_page_in

public int st_page_in

Pages read into the cache.

st_page_out

public int st_page_out

Pages written from the cache to the backing file.

st_ro_evict

public int st_ro_evict

Clean pages forced from the cache.

st_rw_evict

public int st_rw_evict

Dirty pages forced from the cache.

st_page_trickle

public int st_page_trickle

Dirty pages written using the DbEnv.memoryPoolTrickle method.

st_pages

public int st_pages

Pages in the cache.

st_page_clean

public int st_page_clean

Clean pages currently in the cache.

st_page_dirty

public int st_page_dirty

Dirty pages currently in the cache.

st_hash_buckets

public int st_hash_buckets

Number of hash buckets in buffer hash table.

st_hash_searches

public int st_hash_searches

Total number of buffer hash table lookups.

st_hash_longest

public int st_hash_longest

The longest chain ever encountered in buffer hash table lookups.

st_hash_examined

public int st_hash_examined

Total number of hash elements traversed during hash table lookups.

st_hash_nowait

public int st_hash_nowait

The number of times that a thread of control was able to obtain a hash bucket lock without waiting.

st_hash_wait

public int st_hash_wait

The number of times that a thread of control was forced to wait before obtaining a hash bucket lock.

st_hash_max_wait

public int st_hash_max_wait

The maximum number of times any hash bucket lock was waited for by a thread of control.

st_region_nowait

public int st_region_nowait

The number of times that a thread of control was able to obtain a region lock without waiting.

st_region_wait

public int st_region_wait

The number of times that a thread of control was forced to wait before obtaining a region lock.

st_alloc

public int st_alloc

Number of page allocations.

st_alloc_buckets

public int st_alloc_buckets

Number of hash buckets checked during allocation.

st_alloc_max_buckets

public int st_alloc_max_buckets

Maximum number of hash buckets checked during an allocation.

st_alloc_pages

public int st_alloc_pages

Number of pages checked during allocation.

st_alloc_max_pages

public int st_alloc_max_pages

Maximum number of pages checked during an allocation.

Constructor Detail

DbMpoolStat

public DbMpoolStat()

Method Detail

toString

public String toString()

Provide a string representation of all the fields contained within this class.

Overrides:

toString in class Object

Returns:

The string representation.