MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/01/99 through 12/31/99
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 120,339 7,127,247
MED90 26,536 723,282
MED85 18,020 267,258
MED80 14,853 146,140
MED75 13,190 93,297
MED66 13,235 98,428
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 5,768 136,296
2-4 a.m. 2,110 40,078
4-6 a.m. 595 26,010
6-8 a.m. 3,246 114,273
8-10 a.m. 15,734 639,628
10-12 a.m. 35,288 1,435,231
12-2 p.m. 35,753 1,553,041
2-4 p.m. 42,041 1,724,223
4-6 p.m. 33,754 1,295,405
6-8 p.m. 16,338 724,226
8-10 p.m. 9,138 464,987
10-12 p.m. 6,408 302,254
__________ _____________ _________________
Total: 206,173 8,455,652
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,024
Davis 1,623
Irvine 641
Los Angeles 2,623
Riverside 67
San Diego 4,714
San Francisco 4,208
Santa Barbara 26
Santa Cruz 308
Lawrence Berkeley 221
Lawrence Livermore 165
Los Alamos 0
MELWEB 188,139
Other - UC 169
Other-Network UC 2,245
_____
206,173
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 9,377
Davis 13,051
Irvine 6,013
Los Angeles 31,702
Riverside 514
San Diego 37,826
San Francisco 46,660
Santa Barbara 152
Santa Cruz 1,357
Lawrence Berkeley 1,085
Lawrence Livermore 2,015
Los Alamos 0
MELWEB 8,277,725
Other - UC 287
Other-Network UC 27,888
_____
8,455,652
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.2
Standard deviation in seconds 4.5
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) 22:30
Average session length (minutes:seconds) 23:30
Longest session recorded (minutes:seconds) 307:50
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 333.1
Retrievals per search - standard deviation 4096.9
Percent of searches completed with 0 results 32.5%
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 206,173 11.8%
PRESENT 1,473,575 84.1%
INIT or CLOSE 72,758 4.2%
OTHER 519 0.0%
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 14,130 4.7% 5,945 42.1% 4 724.4 3396.4
PERSONAL AUTHOR 69,682 23.1% 19,461 27.9% 7 77.6 775.8
TITLE WORD 24,189 8.0% 9,347 38.6% 3 164.2 1731.1
SUBSET 675 0.2% 175 25.9% 24 215.6 1141.1
SUBJECT WORD 1,665 0.6% 789 47.4% 11 1125.3 6743.2
SUBJECT 6,837 2.3% 3,761 55.0% 17 831.8 6262.6
EXACT SUBJECT 12,703 4.2% 3,499 27.5% 32 435.1 3014.5
MAJOR SUBJECT 424 0.1% 188 44.3% 19 405.1 1936.1
EXACT MAJOR SUBJ 1,159 0.4% 256 22.1% 30 495.3 4090.0
EXACT TITLE 2,145 0.7% 1,219 56.8% 1 17.3 174.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,188 1.4% 1,955 46.7% 220 1235.5 2719.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 31 0.0% 15 48.4% 7 158.1 297.6
KEYWORD 110233 36.6% 35,983 32.6% 18 668.0 6437.5
DATE 6,391 2.1% 1,473 23.0% 5 155.2 1069.8
LANGUAGE 17,229 5.7% 4,895 28.4% 29 392.1 2701.4
UNIQUE ID 864 0.3% 194 22.5% 1 1.1 0.6
ADDED 3,317 1.1% 3,315 99.9% 20 20.0 25.5
PUB TYPE 7,852 2.6% 2,083 26.5% 22 143.5 987.7
AUTHOR AFFIL. 2,235 0.7% 1,022 45.7% 9 119.8 1834.8
CHEMICAL NAME 55 0.0% 32 58.2% 4 122.2 243.4
EXACT CHEMICAL 34 0.0% 33 97.1% 3 3.0 0.0
AT 13,322 4.4% 4,532 34.0% 22 526.5 2911.4
AGE 462 0.2% 75 16.2% 26 121.1 306.0
ISN 24 0.0% 24 100% 0 0.0 0.0
ARTICLE 288 0.1% 93 32.3% 44 813.9 6263.6
XXS 791 0.3% 432 54.6% 20 562.7 2167.0
XMXS 230 0.1% 143 62.2% 13 931.2 3734.3
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 40 0.0% 22 55.0% 15 1070.3 2975.1
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 63,567 30.8% 23,506 37.0% 7 273.3 2370.7
Single 142,606 69.2% 43,562 30.5% 16 582.8 5703.2
PRESENT commands, by type:
MARC 34.8%
OPAC 24.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS