MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/01/01 through 06/30/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 168,337 8,875,204
MED90 34,546 581,803
MED85 26,524 238,813
MED80 23,291 116,785
MED75 21,810 82,739
MED66 22,341 82,244
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 8,190 246,348
2-4 a.m. 3,264 187,446
4-6 a.m. 1,053 77,504
6-8 a.m. 4,970 175,163
8-10 a.m. 23,143 792,905
10-12 a.m. 52,069 1,743,754
12-2 p.m. 51,548 1,721,346
2-4 p.m. 61,489 1,979,298
4-6 p.m. 47,667 1,583,348
6-8 p.m. 20,067 689,326
8-10 p.m. 13,522 464,099
10-12 p.m. 9,867 317,051
__________ _____________ _________________
Total: 296,849 9,977,588
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,704
Davis 2,577
Irvine 583
Los Angeles 2,096
Riverside 183
San Diego 2,216
San Francisco 4,913
Santa Barbara 96
Santa Cruz 93
Lawrence Berkeley 279
Lawrence Livermore 70
Los Alamos 58
MELWEB 147,156
Searchlight 36,923
Other - UC 96,610
Other-Network UC 1,292
_____
296,849
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 22,632
Davis 30,139
Irvine 16,985
Los Angeles 29,887
Riverside 802
San Diego 21,763
San Francisco 44,181
Santa Barbara 1,258
Santa Cruz 1,125
Lawrence Berkeley 3,673
Lawrence Livermore 4,020
Los Alamos 5,314
MELWEB 5,880,074
Searchlight 241,009
Other - UC 3,661,204
Other-Network UC 13,522
_____
9,977,588
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:09
Average session length (minutes:seconds) 18:28
Longest session recorded (minutes:seconds) 290:14
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 377.5
Retrievals per search - standard deviation 5538.6
Percent of searches completed with 0 results 34.4%
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 296,849 13.5%
PRESENT 1,776,446 80.5%
INIT or CLOSE 130,381 5.9%
OTHER 1,728 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 18,630 4.6% 7,361 39.5% 5 1013.6 10738.0
PERSONAL AUTHOR 92,116 22.8% 25,995 28.2% 7 92.7 1626.3
TITLE WORD 33,595 8.3% 13,158 39.2% 3 210.4 3858.8
SUBSET 542 0.1% 133 24.5% 17 303.2 1212.7
SUBJECT WORD 382 0.1% 204 53.4% 14 1708.9 8952.1
SUBJECT 6,816 1.7% 3,480 51.1% 15 539.1 3315.0
EXACT SUBJECT 13,303 3.3% 3,299 24.8% 30 551.7 4237.9
MAJOR SUBJECT 776 0.2% 372 47.9% 9 450.6 2105.0
EXACT MAJOR SUBJ 1,218 0.3% 270 22.2% 20 242.3 1103.8
EXACT TITLE 3,138 0.8% 1,885 60.1% 1 20.1 246.2
TREE NUMBER 2 0.0% 0 0.0% 295 294.5 408.0
EXACT JOURNAL 4,731 1.2% 1,705 36.0% 357 1646.2 3250.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 92 0.0% 37 40.2% 20 51.2 79.4
KEYWORD 172082 42.5% 62,532 36.3% 16 751.7 8238.9
DATE 7,134 1.8% 1,565 21.9% 6 93.8 1105.3
LANGUAGE 18,132 4.5% 4,817 26.6% 24 362.4 2482.9
UNIQUE ID 716 0.2% 319 44.6% 1 1.0 0.1
ADDED 4,659 1.2% 2,298 49.3% 5 21.5 165.1
PUB TYPE 9,183 2.3% 2,116 23.0% 24 181.4 756.2
AUTHOR AFFIL. 2,279 0.6% 1,006 44.1% 10 120.0 1079.9
CHEMICAL NAME 34 0.0% 18 52.9% 13 889.0 2362.8
EXACT CHEMICAL 10 0.0% 8 80.0% 10 9.5 12.0
AT 13,056 3.2% 4,836 37.0% 20 512.9 3153.8
AGE 605 0.1% 152 25.1% 29 136.7 361.3
ISN 9 0.0% 9 100% 0 0.0 0.0
ARTICLE 283 0.1% 74 26.1% 50 509.6 2331.4
XXS 567 0.1% 236 41.6% 12 796.4 8321.4
XMXS 287 0.1% 95 33.1% 14 159.3 761.3
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 111 0.0% 96 86.5% 3 139.4 216.8
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 77,672 26.2% 26,842 34.6% 7 235.2 3293.9
Single 219,177 73.8% 75,351 34.4% 15 696.1 7698.6
PRESENT commands, by type:
MARC 28.2%
OPAC 31.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS