DNY*_*DNY 4 android firebase firebase-realtime-database
我发现 Firebase 对某些查询的执行速度很慢,即使它是针对一小组数据的。我将Log Level设置为Logger.Level.DEBUG,看看能不能在日志猫中找到一些信息。在这里,在 log cat 中,我发现在 firebase 查询开始之前有很多 GarbageCollector 调用。
W/art:暂停所有线程花费了:119.246ms
W/art:暂停所有线程花费了:15.993ms
I/art:后台部分并发标记清除 GC 释放 178740(5MB) 个 AllocSpace 对象,6(1210KB) 个 LOS 对象,20% 空闲,61MB/77MB,暂停 20.261ms 总计 246.362ms
I/art:后台粘性并发标记清除 GC 释放 421369(15MB) 个 AllocSpace 对象,1(30KB) 个 LOS 对象,11% 空闲,63MB/71MB,暂停 3.699ms 总计 150.208ms
W/art:暂停所有线程花费:38.838ms
I/art:后台粘性并发标记清除 GC 释放 234760(8MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,11% 空闲,63MB/71MB,暂停 3.761ms 总计 124.938ms
I/art:后台粘性并发标记清除 GC 释放 177455(6MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,8% 空闲,65MB/71MB,暂停 4.031ms 总计 109.770ms
I/art:后台粘性并发标记清除 GC 释放 165051(6MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,7% 空闲,65MB/71MB,暂停 3.902ms 总计 105.397ms
W/art:暂停所有线程花费了:19.577ms
W/art:暂停所有线程花费:30.319ms
I/art:后台粘性并发标记清除 GC 释放 133737(5MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,6% 空闲,66MB/71MB,暂停 34.150ms 总计 116.078ms
W/art:暂停所有线程花费:58.275ms
W/art:暂停所有线程花费:31.344ms
I/art:后台部分并发标记清除 GC 释放 239886(8MB) 个 AllocSpace 对象,12(391KB) 个 LOS 对象,19% 空闲,65MB/81MB,暂停 4.279ms 总共 308.630ms
W/art:暂停所有线程花费了:19.896ms
W/art:暂停所有线程花费了:17.442ms
I/art:后台粘性并发标记清除 GC 释放 413361(15MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,10% 空闲,67MB/75MB,暂停 21.411ms 总计 169.188ms
I/art:后台粘性并发标记清除 GC 释放 230648(8MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,10% 空闲,67MB/75MB,暂停 4.088ms 总共 127.504ms
I/art:后台粘性并发标记清除 GC 释放 214282(8MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,9% 空闲,68MB/75MB,暂停 3.783ms 总计 121.986ms
W/art:暂停所有线程花费:8.059ms
W/art:暂停所有线程花费:8.102ms
W/art:暂停所有线程花费了:25.963ms
I/art:后台粘性并发标记清除 GC 释放 160942(6MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,7% 空闲,69MB/75MB,暂停 33.338ms 总计 135.224ms
I/art:后台粘性并发标记清除 GC 释放 158679(5MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,7% 空闲,69MB/75MB,暂停 4.614ms 总计 119.459ms
I/art:后台粘性并发标记清除 GC 释放 149782(5MB) 个 AllocSpace 对象,0(0B) 个 LOS 对象,6% 空闲,70MB/75MB,暂停 3.840ms 总共 100.132ms
W/art:暂停所有线程花费:59.880ms
I/art:后台粘性并发标记清除 GC 释放 86107(3MB) 个 AllocSpace 对象,9(221KB) 个 LOS 对象,2% 释放,73MB/75MB,暂停 5.562ms 总共 66.501ms
W/art:暂停所有线程花费了:16.000ms
I/art:后台粘性并发标记清除 GC 释放 68706(2MB) 个 AllocSpace 对象,8(204KB) 个 LOS 对象,2% 释放,73MB/75MB,暂停 5.063ms 总共 68.463ms
I/art:后台粘性并发标记清除 GC 释放 66336(2MB) 个 AllocSpace 对象,10(242KB) 个 LOS 对象,1% 空闲,73MB/75MB,暂停 5.038ms 总计 69.289ms
I/art:后台粘性并发标记清除 GC 释放 60331(2MB) 个 AllocSpace 对象,7(177KB) 个 LOS 对象,1% 空闲,74MB/75MB,暂停 5.181ms 总共 54.786ms
W/art:暂停所有线程花费了:27.598ms
I/art:后台粘性并发标记清除 GC 释放 64552(2MB) 个 AllocSpace 对象,7(155KB) 个 LOS 对象,1% 空闲,74MB/75MB,暂停 17.137ms 总共 81.332ms
I/art:后台粘性并发标记清除 GC 释放 48948(1803KB) 个 AllocSpace 对象,7(158KB) 个 LOS 对象,1% 空闲,74MB/75MB,暂停 6.488ms 总共 63.935ms
I/art:后台粘性并发标记清除 GC 释放 46732(1694KB) 个 AllocSpace 对象,3(59KB) 个 LOS 对象,1% 空闲,74MB/75MB,暂停 6.090ms 总共 62.455ms
I/art:后台粘性并发标记清除 GC 释放 39782(1456KB) 个 AllocSpace 对象,2(46KB) 个 LOS 对象,1% 空闲,74MB/75MB,暂停 5.956ms 总共 63.859ms
I/art:后台部分并发标记清除 GC 释放 339007(11MB) 个 AllocSpace 对象,119(3MB) 个 LOS 对象,18% 空闲,70MB/86MB,暂停 4.144ms 总计 287.479ms
I/art:后台粘性并发标记清除 GC 释放 481371(17MB) 个 AllocSpace 对象,83(2MB) 个 LOS 对象,10% 空闲,71MB/79MB,暂停 3.836ms 总计 136.776ms
I/art:后台粘性并发标记清除 GC 释放 306454(10MB) 个 AllocSpace 对象,52(1234KB) 个 LOS 对象,10% 空闲,70MB/78MB,暂停 5.471ms 总计 103.283ms
I/art:后台粘性并发标记清除 GC 释放 186051(7MB) 个 AllocSpace 对象,142(3MB) 个 LOS 对象,10% 空闲,69MB/77MB,暂停 4.630ms 总共 112.830ms
I/art:WaitForGcToComplete 因 HeapTrim 被阻塞了 45.513 毫秒
W/art:暂停所有线程花费了:45.069ms
I/art:后台粘性并发标记清除 GC 释放 214400(7MB) 个 AllocSpace 对象,31(749KB) 个 LOS 对象,7% 空闲,70MB/76MB,暂停 3.877ms 总计 105.103ms
D/Connection: conn_1 - 发送数据:{d={a=q, r=2, b={h=bHJ1mWrKhIU9GTHaIkUYeaP43Bo=, p=/, ch={hs=[bALDIOju3KaZT2xWiQLaLKH0SBo=, q3NZ6/Tp1d9tkAktAktAktAkQtAkQtAkQd4VktAkAktAkAktA YuhYIGzgf5OgmLXVSuzPPXECeWc =,KuI8A5 + 9hRky9NolHYvkl7bilNU =,55dGIfQzMgxtbAU / zpVoKfl3LuA =,9VoUeg4sRIYfhTJugtwIANcdPH0 =,B4 / sKMEhxWFOqBH3uMbpiWAwH30 =,s5xLa798i1518s9djUrjgyb18XE =,xw69BGenjYvwg7RILHBPtwXhVyQ =,aHCtTSD3ox + WXaryBp3uu3Nfz /克=,tC0zEvCLJljHSpbfgGWIZIcYdLo =,bcOAzAwkWR8yUVLYEdTpiNXxvxE =,rbaiPzhMDh7ahB1aSsJ8cf63MZg =,IUDU7S7GA0tL3UGjxmI45ofEX24 =,NzdrheN8DXqBUfY + RM3L3q7hG4Q = ,ekjUn4lnbwdGwje6 + cNES2VKJxE =,fI1b1 + / CRsQIMT3mt / i50nbQ8Y8 =,E9mvQdFfiStRtZ8eJkBHhVAqnvo =,BOF1YmJJFg2Lusty1JgUnMEw3xI =,lbwxveJ9cFhXSfT2D0WOmWrmYMM =,clZotfKSAOhwccTaUYycSTgj15M =,xkoLdSPI8W + E + plppywrVOFFb5s =,INp7uMxgaFNCX4kkBx3GRNHsRAQ =,euVHoK0S / jbYsnD61W5Wje7W7cQ =,GAvJN0eMxpQ8qKVq8hF67Rf5dWo =,HVAHhdpBFbSocGKEVpZDHhW4Ub0 =,+ 8UAZrKp2fa2LjCNvx3ZufTEz98 =,P6npjI8doaqjVHRMmP + s4jpMnEw 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B4O4NB2Uo5FDKmysc =,AfMe4uVvrK2cFHIdx2N / LcKwC + 4 =,EKaXGSUB2GGYIThPKFt3AKvZ3rU =,jqjJfCkF9aLo7eAyc8UJ2u4uOsA =,+ hft27daYSvuWZ8dsgwhC7 + VQj4 =,dwjaXCITJqIZH1LwPplb7LNq8Ho =,Pbz4g + DcxprOt2ef8aUCNRyzfFE =, UB9ILOgzQZ + fA3G6I2Rcj9HyVmU =,ht3jvak0cAeSkuX9c7 + LNzPCopk =,7bEDyPX / QjUJFnkdoQ2Qubq8ang =,RHn75CDN80Jz3UQIVXGQPyIrgbg =,BXay0TBI3PlUH + bSsbd0UtvBd8I =,W8PxyIuVGta61mBe5JzdqLS7 + ZG =,HzHQx4oxAirWHzbx5Atg3YsgdvU =,Swu1s + 1wuaIPJTG67SPbz4g + DcxprOt2ef8aUCNRyzfFE =,UB9ILOgzQZ + fA3G6I2Rcj9HyVmU =,ht3jvak0cAeSkuX9c7 + LNzPCopk =,7bEDyPX / QjUJFnkdoQ2Qubq8ang =,RHn75CDN80Jz3UQIVXGQPyIrgbg =,BXay0TBI3PlUH + bSsbd0UtvBd8I =,W8PxyIuVGta61mBe5JzdqLS7 + ZG =,HzHQx4oxAirWHzbx5Atg3YsgdvU =,Swu1s + 1wuaIPJTG67SPbz4g + DcxprOt2ef8aUCNRyzfFE =,UB9ILOgzQZ + fA3G6I2Rcj9HyVmU =,ht3jvak0cAeSkuX9c7 + LNzPCopk =,7bEDyPX / QjUJFnkdoQ2Qubq8ang =,RHn75CDN80Jz3UQIVXGQPyIrgbg =,BXay0TBI3PlUH + bSsbd0UtvBd8I =,W8PxyIuVGta61mBe5JzdqLS7 + ZG =,HzHQx4oxAirWHzbx5Atg3YsgdvU =,Swu1s + 1wuaIPJTG67S
它会导致相对较长的延迟(> 10 秒)。我将启用持久性设置为 true,我使用的 Firebase 版本是 9.4.0
我该如何解决这个问题?
从您提供的日志输出(谢谢!)看来,您实际上是在收听整个 Firebase 数据库(最后一行中的“p=/”表示您正在 / 上开始收听)。这将读取离线缓存的全部内容并对其进行一些处理,以便我们可以将缓存数据的哈希值发送到服务器,以尽量减少产生的带宽。根据数据的大小,这很可能会触发大量的 GC 活动。
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