Details
Description
not sure how to reproduce, it happened on dan's test server after running a heavy workload.
dan:PRIMARY> db.serverStatus().wiredTiger.cache
|
{
|
"tracked dirty bytes in the cache" : 108113698,
|
"bytes currently in the cache" : NumberLong("2305843128198539"),
|
"maximum bytes configured" : 2147483648,
|
"bytes read into cache" : 74306876990,
|
"bytes written from cache" : 55231308853,
|
"pages evicted by application threads" : 100627896064,
|
"checkpoint blocked page eviction" : 1930,
|
"unmodified pages evicted" : 812357,
|
"page split during eviction deepened the tree" : 4,
|
"modified pages evicted" : 1753265,
|
"pages selected for eviction unable to be evicted" : 1651488,
|
"pages evicted because they exceeded the in-memory maximum" : 1619,
|
"pages evicted because they had chains of deleted items" : 253949,
|
"failed eviction of pages that exceeded the in-memory maximum" : 3363,
|
"hazard pointer blocked page eviction" : 3565,
|
"internal pages evicted" : 385,
|
"maximum page size at eviction" : 147633879,
|
"eviction server candidate queue empty when topping up" : 28707,
|
"eviction server candidate queue not empty when topping up" : 255279,
|
"eviction server evicting pages" : 185,
|
"eviction server populating queue, but not evicting pages" : 283801,
|
"eviction server unable to reach eviction goal" : 1,
|
"pages split during eviction" : 6618,
|
"pages walked for eviction" : 159135276,
|
"in-memory page splits" : 545,
|
"tracked dirty pages in the cache" : 588,
|
"pages currently held in the cache" : 1145,
|
"pages read into cache" : 2401943,
|
"pages written from cache" : 1840049
|
}
|
monogstat shows that the cache is totally full of dirty bytes:
2723 7960 5648 *0 0 0|0 72.8 100.0 0 3.4G 2.8G 0|0 8|84 16m 14m 103 dan PRI 13:28:10
|
3779 10952 7308 *0 0 1|0 89.3 99.9 0 3.4G 2.8G 0|0 23|66 21m 19m 103 dan PRI 13:28:12
|
insert query update delete getmore command % dirty % used flushes vsize res qr|qw ar|aw netIn netOut conn set repl time
|
1787 5054 3349 *0 0 0|0 100.1 100.9 0 3.4G 2.8G 0|0 28|72 10m 9m 103 dan PRI 13:28:14
|
*0 *0 *0 *0 0 1|0 100.1 100.9 0 3.4G 2.8G 0|0 27|73 160b 9k 103 dan PRI 13:28:16
|
*0 *0 *0 *0 0 0|0 100.1 100.9 0 3.4G 2.8G 0|0 27|73 1k 9k 103 dan PRI 13:28:18
|
*0 *0 *0 *0 0 0|0 100.1 100.9 0 3.4G 2.8G 0|0 27|73 39b 8k 103 dan PRI 13:28:20
|
7 12 12 *0 0 1|0 100.2 100.9 0 3.4G 2.8G 0|0 20|80 31k 35k 103 dan PRI 13:28:22
|
6 20 13 *0 0 0|0 100.2 101.0 0 3.4G 2.8G 0|0 22|78 39k 42k 103 dan PRI 13:28:24
|
*0 7 4 *0 0 1|0 100.2 101.0 0 3.4G 2.8G 0|0 20|80 9k 22k 103 dan PRI 13:28:26
|
*0 *0 *0 *0 0 0|0 100.2 101.0 0 3.4G 2.8G 0|0 21|79 921b 8k 103 dan PRI 13:28:28
|
*0 *0 *0 *0 0 0|0 100.2 101.0 0 3.4G 2.8G 0|0 21|79 39b 8k 103 dan PRI 13:28:30
|
*0 *0 *0 *0 0 1|0 100.2 101.0 0 3.4G 2.8G 0|0 21|79 95b 8k 103 dan PRI 13:28:32
|
Attachments
Issue Links
- related to
-
SERVER-17100 mongod hung running mongo-perf
-
- Closed
-
-
SERVER-16941 Cache can grow indefinitely under WiredTiger
-
- Closed
-