MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/01/00 through 09/30/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 173,128 9,008,483
MED90 34,907 724,386
MED85 24,230 287,731
MED80 20,709 129,770
MED75 19,136 107,742
MED66 19,440 117,268
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 9,186 224,109
2-4 a.m. 1,905 47,480
4-6 a.m. 1,293 70,277
6-8 a.m. 4,378 137,793
8-10 a.m. 21,857 802,203
10-12 a.m. 51,274 1,796,014
12-2 p.m. 50,887 1,795,143
2-4 p.m. 61,165 2,128,604
4-6 p.m. 48,024 1,732,503
6-8 p.m. 20,923 832,022
8-10 p.m. 12,346 510,646
10-12 p.m. 8,312 298,586
__________ _____________ _________________
Total: 291,550 10,375,380
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,331
Davis 3,063
Irvine 278
Los Angeles 2,764
Riverside 228
San Diego 3,134
San Francisco 6,538
Santa Barbara 222
Santa Cruz 30
Lawrence Berkeley 217
Lawrence Livermore 42
Los Alamos 3
MELWEB 238,413
Searchlight 32,870
Other - UC 297
Other-Network UC 2,120
_____
291,550
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 12,702
Davis 45,675
Irvine 4,110
Los Angeles 35,210
Riverside 2,238
San Diego 28,298
San Francisco 60,784
Santa Barbara 1,772
Santa Cruz 397
Lawrence Berkeley 1,568
Lawrence Livermore 1,064
Los Alamos 22
MELWEB 9,937,447
Searchlight 198,398
Other - UC 1,407
Other-Network UC 44,288
_____
10,375,380
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:31
Average session length (minutes:seconds) 19:48
Longest session recorded (minutes:seconds) 324:12
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 421.9
Retrievals per search - standard deviation 5931.5
Percent of searches completed with 0 results 31.8%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 291,550 12.6%
PRESENT 1,891,622 81.9%
INIT or CLOSE 123,194 5.3%
OTHER 1,904 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 19,213 4.6% 7,417 38.6% 4 784.7 3957.7
PERSONAL AUTHOR 93,216 22.4% 25,626 27.5% 7 87.2 1006.1
TITLE WORD 32,384 7.8% 11,660 36.0% 3 171.8 1720.9
SUBSET 750 0.2% 209 27.9% 27 163.8 612.1
SUBJECT WORD 781 0.2% 397 50.8% 11 2102.8 25800.0
SUBJECT 8,552 2.1% 4,510 52.7% 18 608.1 4213.2
EXACT SUBJECT 17,948 4.3% 4,282 23.9% 32 496.0 3817.5
MAJOR SUBJECT 820 0.2% 359 43.8% 23 338.2 960.8
EXACT MAJOR SUBJ 1,918 0.5% 428 22.3% 25 259.7 884.2
EXACT TITLE 3,148 0.8% 1,746 55.5% 1 19.4 224.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,948 1.2% 1,847 37.3% 340 1721.6 3534.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 125 0.0% 61 48.8% 6 54.0 142.5
KEYWORD 164608 39.5% 54,295 33.0% 17 859.9 9272.9
DATE 8,236 2.0% 1,996 24.2% 5 126.6 1191.0
LANGUAGE 22,365 5.4% 5,871 26.3% 28 369.8 2802.6
UNIQUE ID 1,297 0.3% 231 17.8% 1 1.0 0.4
ADDED 5,524 1.3% 3,267 59.1% 5 31.8 695.4
PUB TYPE 10,441 2.5% 2,315 22.2% 23 144.3 614.0
AUTHOR AFFIL. 2,914 0.7% 1,282 44.0% 7 111.8 1685.0
CHEMICAL NAME 69 0.0% 33 47.8% 7 45.6 94.1
EXACT CHEMICAL 11 0.0% 11 100% 0 0.0 0.0
AT 14,595 3.5% 4,684 32.1% 21 631.7 5900.0
AGE 1,023 0.2% 268 26.2% 21 129.1 433.6
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 434 0.1% 110 25.3% 34 306.9 1208.9
XXS 776 0.2% 349 45.0% 15 1201.9 11754.1
XMXS 386 0.1% 148 38.3% 16 489.3 2166.6
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 49 0.0% 40 81.6% 13 242.8 438.2
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 84,859 29.1% 28,831 34.0% 7 260.6 3177.7
Single 206,691 70.9% 63,921 30.9% 16 759.3 8224.6
PRESENT commands, by type:
MARC 32.4%
OPAC 29.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS